A method, apparatus and equipment for determining power grid fault types

Abstract

This invention discloses a method, apparatus, and equipment for determining power grid fault types. Based on the relationships between protection devices in a primary bay within a substation, a first topology diagram is constructed, and based on the line connection information between substations, a second topology diagram is constructed. A data association model is constructed based on the first and second topology diagrams. For each protection device, when a change in the status information of the protection device is detected, a target protection device is determined. For each target protection device, associated protection devices are determined based on the timestamp of the current target protection device's state change and the status information of each protection device within a preset time period. Based on the first waveform recording data of the target protection device, the second waveform recording data of the fault waveform recording device, the data association model, and the association relationship between the target protection device and associated protection devices, the power grid fault type of the target protection device is determined, thereby avoiding the incorrect archiving of simulated faults and improving the accuracy of fault archiving.

Description

Technical Field

[0001] This invention relates to the field of data processing technology, and in particular to a method, apparatus and equipment for determining power grid fault types. Background Technology

[0002] During power generation, power grid faults may occur due to environmental factors and equipment aging. When a real power grid fault occurs, the relay protection fault information processing system collects event information and fault waveform data from relevant relay protection devices at the time of the fault, generating a fault analysis report for archiving. However, during relay protection device maintenance, instruments are used to simulate power grid faults to verify the correct operation of the relay protection devices. For these simulated power grid faults, the relay protection fault information processing system does not need to archive them. Therefore, the system must be able to accurately distinguish between real and simulated power grid faults.

[0003] Currently, relay protection fault information processing systems typically obtain equipment maintenance tagging information or primary switch operation information from other systems to determine whether the relay protection device is experiencing a real or simulated power grid fault.

[0004] However, in the actual application of the current relay protection fault information processing system, most relay protection devices are not connected to other systems and cannot fully obtain equipment maintenance tagging information or primary switch action information, which limits the scope of application for judging real power grid faults and simulated power grid faults. As a result, there are problems such as low accuracy of power grid fault classification and low accuracy of fault archiving. Summary of the Invention

[0005] This invention provides a method, apparatus, and equipment for determining power grid fault types, thereby avoiding the incorrect filing of simulated power grid faults, improving the accuracy of power grid fault classification, and enhancing the accuracy of fault filing.

[0006] In a first aspect, the present invention provides a method for determining the type of power grid fault, the method comprising:

[0007] A first topology diagram is constructed based on the association between the protection devices corresponding to at least two primary bays within the plant, and a second topology diagram is constructed based on the line connection information between at least two plants; wherein, a primary bay is an electrical unit composed of primary equipment, and each primary bay within the plant has a corresponding protection device, which is used to protect the primary equipment in the primary bay;

[0008] Based on the first and second topology diagrams, a data association model is constructed. The data association model includes information on each bus bay within the plant, information on the primary bays connected to each bus bay within the plant, information on the protection devices corresponding to the primary bays within the plant, and information on the protection devices on both sides of the same line between plants.

[0009] For each of the aforementioned protection devices, when the status information of the protection device is detected to change from a first state to a second state, the protection device is determined to be a target protection device; wherein, the second state is at least one of an activation state or an operation state;

[0010] For each target protection device, based on the timestamp when the current target protection device changes state and the state information of each protection device within a preset time period, the associated protection device is determined to be related to the current target protection device.

[0011] Based on the first waveform data generated by the target protection device, the second waveform data generated by the fault waveform device, the data association model, and the association relationship of the associated protection devices associated with the target protection device, the power grid fault type of the target protection device is determined; wherein, the power grid fault type includes real power grid faults or simulated power grid faults.

[0012] In a second aspect, the present invention provides a power grid fault type determination device, the device comprising:

[0013] The topology diagram construction module is used to construct a first topology diagram based on the association relationship between the protection devices corresponding to at least two primary bays within a plant, and to construct a second topology diagram based on the line connection information between at least two plants; wherein, a primary bay is an electrical unit composed of primary equipment, and each primary bay within a plant has a corresponding protection device, the protection device being used to protect the primary equipment in the primary bay;

[0014] The data model construction module is used to construct a data association model based on the first topology diagram and the second topology diagram. The data association model includes information on each bus bay within the plant, information on the primary bays connected to different bus bays within the plant, information on the protection devices corresponding to the primary bays within the plant, and information on the protection devices on both sides of the same line between plants.

[0015] The target device determination module is used to determine the protection device as a target protection device when the status information of the protection device changes from a first state to a second state; wherein the second state is at least one of an activation state or an operation state.

[0016] The associated device determination module is used to determine the associated protection device associated with the current target protection device based on the timestamp when the current target protection device changes state and the state information of each protection device within a preset time period.

[0017] The fault type determination module is used to determine the power grid fault type of the target protection device based on the first waveform data generated by the target protection device, the second waveform data generated by the fault waveform device, the data association model, and the association relationship of the associated protection devices associated with the target protection device; wherein, the power grid fault type includes real power grid faults or simulated power grid faults.

[0018] Thirdly, the present invention provides a data processing electronic device, comprising:

[0019] At least one processor; and

[0020] A memory that is communicatively connected to at least one processor; wherein,

[0021] The memory stores a computer program that can be executed by at least one processor, such that the at least one processor is able to perform the power grid fault type determination method according to any embodiment of the present invention.

[0022] Fourthly, the present invention provides a computer-readable storage medium storing computer instructions that, when executed by a processor, implement the power grid fault type determination method of any embodiment of the present invention.

[0023] Fifthly, the present invention provides a computer program product, which includes a computer program that, when executed by a processor, implements the power grid fault type determination method of any embodiment of the present invention.

[0024] The technical solution provided by this invention constructs a first topology diagram based on the relationship between protection devices in a primary bay within a power plant, and a second topology diagram based on the line connection information between power plants. A primary bay is an electrical unit composed of primary equipment, and each primary bay within a power plant has a corresponding protection device for protecting the primary equipment within that bay. Furthermore, based on the first and second topology diagrams, a data association model is constructed. For each protection device, when a change in the status information of the protection device is detected, the protection device is identified as a target protection device. Further, for each target protection device, based on the timestamp of the current target protection device's state change and the status information of each protection device within a preset time period, associated protection devices are determined. Finally, based on the first waveform data generated by the target protection device, the second waveform data generated by the fault waveform device, the data association model, and the association relationships of the associated protection devices with the target protection device, the power grid fault type of the target protection device is determined to be either a real power grid fault or a simulated power grid fault. The technical method provided in this embodiment solves the technical problem that the inability to accurately distinguish the types of power grid faults leads to low accuracy in fault archiving. It avoids the erroneous archiving of simulated power grid faults, improves the accuracy of power grid fault type determination, and thus improves the accuracy of fault archiving.

[0025] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0027] Figure 1 This is a flowchart of a method for determining power grid fault types provided in Embodiment 1 of the present invention;

[0028] Figure 2 This is a schematic diagram of the first topology structure involved in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the second topology structure involved in an embodiment of the present invention;

[0030] Figure 4 This is a flowchart of a method for determining power grid fault types provided in Embodiment 2 of the present invention;

[0031] Figure 5 This is a schematic diagram illustrating the process of determining the power grid fault type of the target protection device according to an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of a power grid fault type determination device provided in Embodiment 3 of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of an electronic device provided in Embodiment 4 of the present invention. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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 scope of protection of the present invention.

[0035] It should be noted that the terms "first preset condition," "second preset condition," etc., used in the specification, claims, and accompanying drawings of this invention 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 the invention described herein can be implemented 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.

[0036] Before introducing this technical solution, an illustrative application scenario can be provided. During power generation, the power grid may experience faults due to environmental factors, equipment aging, and other factors; these are real power grid faults. When a real power grid fault occurs, the relay protection fault information processing system collects event information and fault waveform data from the relevant relay protection devices at the time of the fault, generating a fault analysis report for archiving. In practical applications, when power equipment is first put into production or during routine maintenance, instruments are used to simulate power grid faults to verify the correct operation of the relay protection devices. The resulting power grid fault is a simulated power grid fault, and the relay protection fault information processing system does not need to archive such simulated power grid faults. Therefore, the relay protection fault information processing system needs to accurately distinguish between real and simulated power grid faults, thereby archiving the fault data corresponding to real power grid faults. This invention aims to accurately identify the type of power grid fault, that is, when a relay protection device operates, it can distinguish whether the power grid fault corresponding to that operation is a real or simulated power grid fault.

[0037] Example 1

[0038] Figure 1 This is a flowchart of a method for determining power grid fault types according to Embodiment 1 of the present invention. This embodiment is applicable to situations where, when a protection device operates, it is necessary to distinguish whether the power grid fault corresponding to the operation is a real power grid fault or a simulated power grid fault. This method can be executed by a power grid fault type determination device, which can be implemented in hardware and / or software. This device can be configured on a computer device, such as a laptop, desktop computer, or smart tablet. Figure 1 As shown, the method includes:

[0039] S110. Based on the association between the protection devices corresponding to at least two primary bays within the substation, construct a first topology diagram, and based on the line connection information between at least two substations, construct a second topology diagram.

[0040] In this context, a power plant can be understood as a substation, and multiple power plants are configured within a certain area. Each power plant has at least one busbar, and each busbar has at least one primary winding bay. A primary winding bay is a fully functional electrical unit composed of primary equipment, which refers to high-voltage electrical equipment directly used in the production, transmission, and distribution of electrical energy. This includes generators, transformers, circuit breakers, disconnectors, automatic switches, contactors, knife switches, busbars, transmission lines, power cables, reactors, motors, etc. Each primary winding bay within a power plant has a corresponding protection device. This protection device can be a relay protector. The protection device protects the primary equipment within the primary winding bay; when some equipment in the primary winding bay fails, the corresponding protection device will change its state.

[0041] The first topology diagram represents the relationships between busbars, primary bays, and corresponding protection devices within a power plant. The second topology diagram represents the relationships between different power plants.

[0042] For example, a schematic diagram of the first topology can be found here. Figure 2 ,like Figure 2 The diagram shows the internal wiring connections of plant A. Plant A has one busbar with three primary bays: primary bay 1, primary bay 2, and primary bay 3. Protection device 1 corresponds to primary bay 1, protection device 2 corresponds to primary bay 2, and protection device 3 corresponds to primary bay 3. A schematic diagram of the second topology can be found in [reference needed]. Figure 3 ,like Figure 3 The diagram shows five power plants within a certain area: Power Plant A, Power Plant B, Power Plant C, Power Plant D, and Power Plant E. Power Plant B and Power Plant D are connected by Line 3, Power Plant D and Power Plant E are connected by Line 4, and Power Plant D and Power Plant F are connected by Line 5.

[0043] S120. Based on the first and second topology diagrams, construct a data association model.

[0044] The data association model can be understood as a database that collects and summarizes a large amount of data. It can collect the device connection relationships in the first topology diagram, the data generated by each device, and the connection relationships between plants and stations in the second topology diagram into this database. When it is determined that a fault may occur in a single interval corresponding to a certain protection device, the data association model can, according to pre-set indexing rules, search for other protection devices that are associated with the current protection device and determine the specific association relationship between the current protection device and other protection devices.

[0045] It is understandable that in the data association model, the device connection relationship in the first topology diagram and the plant connection relationship in the second topology diagram are relatively fixed, while the data generated by each device is generated in real time, that is, the data generated by each device is updated in stages, so the data content in the data association model also changes in real time.

[0046] In this embodiment, the data association model includes information on each busbar bay within the substation, information on the primary bays connected to each busbar bay within the substation, information on the protection devices corresponding to the primary bays within the substation, and information on the protection devices on both sides of the same line between substations. The information on each busbar bay within the substation represents the time correlation between multiple busbar bays within a certain area; the information on the primary bays connected to each busbar bay within the substation can be found in [reference needed]. Figure 2 Primary bay 1, primary bay 2, and primary bay 3 are listed in the diagram; information on the protection devices corresponding to the primary bays within the plant can be found in [reference needed]. Figure 2 Protection devices 1, 2, and 3 are listed in the text; for information on protection devices on both sides of the same line between power plants, see the example provided. Figure 3 Taking Line 1 as an example, the substations on both sides of Line 1 are Substation A and Substation B. The protection device information on both sides of the same line between the substations is the information corresponding to each protection device in Substation A and Substation B.

[0047] Specifically, the device connection relationships in the first topology diagram can be converted into the form of a data table, and the protection devices corresponding to each interval can be stored in the form of key-value pairs. The connection relationships between plants and stations in the second topology diagram can also be converted into the form of a data table, and then a data association model can be built based on the data table and key-value pairs.

[0048] S130. For each protection device, when the status information of the protection device is detected to change from the first state to the second state, the protection device is determined to be the target protection device.

[0049] The status information can include a first state and a second state. The first state is a static state, and the second state is at least one of an activated state or an operational state. It is understood that the protection device can be a relay protection device. When there is no fault in the power grid corresponding to the protection device, the status information of the protection device is in a static state, i.e., the first state, and the switching elements of the protection device will not change. When a fault occurs in the power grid corresponding to the protection device, the status information of the protection device is in an activated state or an operational state, i.e., the second state. In this case, the switching elements of the protection device will change, and the device will respond to the power grid fault to protect the entire power grid line. When the status information of the protection device is in an activated state, an activation event occurs. An activation event occurs when the relay protection device detects a power grid fault, the protection element activates, and reports the event information. When the status information of the protection device is in an operational state, an operational event occurs. An operational event occurs when the relay protection device detects a power grid fault, issues a trip output, and reports the event information.

[0050] Among them, the target protection device is defined as the device that is selected as the target protection device if, during the monitoring of various protection devices within a certain area, the status information of a certain protection device changes from a static state to an active state or an operational state.

[0051] Based on the above embodiments, the method for determining the target protection device may be: monitoring the status information of each protection device within a preset area; when the status information of the protection device changes from the first state to the second state, the protection device is determined to be the target protection device.

[0052] The preset area is a pre-defined designated area. Within the preset area, a relay protection fault information processing system monitors the status of all relay protection devices within the area.

[0053] Specifically, the relay protection fault information processing system can monitor the status information of all protection devices in all substations within a preset area in real time. When the system detects that the status information of a certain protection device changes from a static state to an active state or an operational state, it can designate this protection device as the target protection device. It is understood that multiple target protection devices can be identified simultaneously; the specific number of target protection devices is not limited here.

[0054] For example, such as Figure 3As shown, the preset area S includes 5 substations, namely substation A, substation B, substation C, substation D and substation E. Each substation is equipped with multiple protection devices. The relay protection fault information processing system can monitor the status information of all protection devices in the 5 substations in the preset area S in real time. When the relay protection fault information processing system detects that the status information of protection device 1 in substation A changes from static state to start state or action state, protection device 1 can be used as the target protection device.

[0055] S140. For each target protection device, based on the timestamp when the current target protection device changes state and the state information of each protection device within a preset time period, determine the associated protection device related to the current target protection device.

[0056] The timestamp represents the point in time when the status information of the current target protection device changes. The preset duration is a pre-defined time period. Associated protection devices can be understood as protection devices whose status information changes within a preset time period before and after the change in the status information of the current target protection device.

[0057] Based on the above embodiments, the method for determining the associated protection device may be: determining the timestamp when the current target protection device changes state; using the timestamp as a reference, determining whether the state information of each protection device has changed within a preset time period; if the state information of a protection device changes, then it is regarded as the associated protection device associated with the current target protection device; if the state information of no protection device changes, then there is no associated protection device.

[0058] In this embodiment, the method for determining the associated protection device corresponding to each target protection device is the same. Here, only one target protection device is used as an example for illustrative purposes. When determining the associated protection device of a target protection device, firstly, the timestamp of the current target protection device's state change is determined, for example, 12:00:00. Based on the timestamp, a time range is determined with a preset duration of 5 seconds, for example, from 11:59:55 to 12:00:05. Further, the relay protection fault information processing system determines whether any protection device other than the current target protection device has undergone a state change within the time range of 11:59:55 to 12:00:05. If the state information of other protection devices changes, they are considered as associated protection devices of the current target protection device. If the state information of no protection device changes, there are no associated protection devices of the current target protection device.

[0059] S150. Based on the first waveform data generated by the target protection device, the second waveform data generated by the fault waveform device, the data association model, and the association relationship of the associated protection devices associated with the target protection device, determine the power grid fault type of the target protection device.

[0060] In this embodiment, each protection device has a built-in waveform recording configuration. For the target protection device, when a fault occurs in the power grid corresponding to the target protection device, the target protection device can record waveform data. The fault waveform recording device can record fault waveform data of all protection devices within a certain area, and the data recorded by the fault waveform recording device is the second waveform data.

[0061] Among them, the types of power grid faults include real power grid faults or simulated power grid faults.

[0062] In this embodiment, the relay protection fault information processing system can monitor the status of all protection devices in the area in real time. After identifying a target protection device, it further determines whether there are any associated protection devices corresponding to the current target protection device. If there are associated protection devices corresponding to the current target protection device, the association relationship of the associated protection devices corresponding to the current target protection device is determined according to the data association model. It can further determine whether the association relationship meets the first preset condition, and determine the grid fault type of the target protection device based on the judgment result. If there are associated protection devices corresponding to the current target protection device, the numerical relationship between the first waveform data and the second waveform data is determined according to the first waveform data generated by the target protection device and the second waveform data generated by the fault waveform device. It can further determine whether the numerical relationship meets the second preset condition, and determine the grid fault type of the target protection device based on the judgment result.

[0063] The technical solution provided by this invention constructs a first topology diagram based on the relationship between protection devices in a primary bay within a power plant, and a second topology diagram based on the line connection information between power plants. A primary bay is an electrical unit composed of primary equipment, and each primary bay within a power plant has a corresponding protection device for protecting the primary equipment within that bay. Furthermore, based on the first and second topology diagrams, a data association model is constructed. For each protection device, when a change in the status information of the protection device is detected, the protection device is identified as a target protection device. Further, for each target protection device, based on the timestamp of the current target protection device's state change and the status information of each protection device within a preset time period, associated protection devices are determined. Finally, based on the first waveform data generated by the target protection device, the second waveform data generated by the fault waveform device, the data association model, and the association relationships of the associated protection devices with the target protection device, the power grid fault type of the target protection device is determined to be either a real power grid fault or a simulated power grid fault. The technical method provided in this embodiment solves the technical problem that the inability to accurately distinguish the types of power grid faults leads to low accuracy in fault archiving. It avoids the erroneous archiving of simulated power grid faults, improves the accuracy of power grid fault type determination, and thus improves the accuracy of fault archiving.

[0064] Example 2

[0065] Figure 4 This is a flowchart of a method for determining power grid fault types according to Embodiment 2 of the present invention. Based on the above embodiments, this embodiment further refines steps S120 and S130. This embodiment can be combined with various optional solutions from one or more of the above embodiments. For example... Figure 4 As shown, the method includes:

[0066] S210. Based on the association between the protection devices corresponding to at least two primary bays within the substation, construct a first topology diagram, and based on the line connection information between at least two substations, construct a second topology diagram.

[0067] S220. Based on the first and second topology diagrams, construct a data association model.

[0068] S230. For each protection device, when the status information of the protection device is detected to change from the first state to the second state, the protection device is determined to be the target protection device.

[0069] S240. For each target protection device, based on the timestamp when the current target protection device changes state and the state information of each protection device within a preset time period, determine the associated protection device related to the current target protection device.

[0070] S250. Determine if there is an associated protection device.

[0071] Based on the above embodiments, after determining a target protection device, it is further determined whether there is an associated protection device corresponding to the current target protection device. If there is an associated protection device, S261 is executed; if there is no associated protection device, S262 is executed.

[0072] S261. If there are associated protection devices, the power grid fault type of the target protection device shall be determined according to the data association model and the association relationship of the associated protection devices related to the target protection device.

[0073] Based on the above embodiments, determining the grid fault type of the target protection device in this step may include: based on the data association model, determining whether the primary interval associated with the associated protection device and the target protection device is located on the same bus; if so, determining that the grid fault type corresponding to the target protection device is a real grid fault; if not, determining whether the associated protection device and the target protection device are protection devices on both sides of the same line, and determining the judgment result; based on the judgment result, determining the grid fault type of the target protection device.

[0074] In this embodiment, a schematic diagram of the process for determining the power grid fault type of the target protection device is shown below. Figure 5 .like Figure 5As shown, after identifying the target protection device and its corresponding associated protection devices, the correlation between multiple protection devices within each substation recorded in the data correlation model can be used to determine whether the primary bay associated with the target protection device is located on the same busbar. Further, if the primary bay associated with the target protection device is on the same busbar, the grid fault type corresponding to the target protection device can be directly determined to be a real grid fault. If the primary bay associated with the target protection device is not on the same busbar, the correlation between multiple protection devices between substations recorded in the data correlation model can be used to further determine whether the primary bay associated with the target protection device is a protection device on both sides of the same line. Further still, if the primary bay associated with the target protection device is a protection device on both sides of the same line, the grid fault type corresponding to the target protection device is determined to be a real grid fault. If the primary bay associated with the target protection device is not a protection device on both sides of the same line, the grid fault type of the target protection device is determined based on the first waveform data generated by the target protection device and the second waveform data generated by the fault waveform device.

[0075] For example, such as Figure 2 As shown, if protection device 1 is the target protection device and protection device 2 is the associated protection device corresponding to the target protection device, then it can be determined that the primary interval associated with protection device 1 and protection device 2 is located on the same busbar, and the power grid fault type corresponding to protection device 1 can be directly determined to be a real power grid fault. If protection device 1 is the target protection device and protection device S is the associated protection device corresponding to the target protection device, such as... Figure 3 As shown, protection device 1 is a protection device within substation A, and protection device S is a protection device within substation B. At this time, the primary winding associated with protection device 1 and protection device S is not located on the same busbar. However, the primary windings associated with protection device 1 and protection device S are protection devices on both sides of line 1. Therefore, it can be determined that the grid fault type corresponding to protection device 1 is a real grid fault. If protection device 1 is the target protection device, and protection device H is the associated protection device corresponding to the target protection device, such as... Figure 3 As shown, protection device 1 is a protection device in plant A, and protection device H is a protection device in plant C. At this time, the primary interval associated with protection device 1 and protection device H is not located on the same bus, and the primary interval associated with protection device 1 and protection device H is not on the same side. At this time, the power grid fault type of the target protection device can be determined based on the first waveform data generated by the target protection device and the second waveform data generated by the fault waveform device.

[0076] S262. If there is no associated protection device, the power grid fault type of the target protection device shall be determined based on the first waveform data generated by the target protection device and the second waveform data generated by the fault waveform device.

[0077] Based on the above embodiments, determining the power grid fault type of the target protection device in this step may include: determining whether the data content of the second waveform data is empty; if the data content of the second waveform data is empty, then determining that the power grid fault type corresponding to the target protection device is a real power grid fault; if the data content of the second waveform data is not empty, then determining a first reference effective value based on the first waveform data, and determining a second reference effective value based on the second waveform data; and determining the power grid fault type of the target protection device based on the difference between the first reference effective value and the second reference effective value.

[0078] The first reference effective value is the effective value corresponding to the fault waveform data recorded by the target protection device. The first reference effective value also includes the first effective value of current and the first effective value of voltage. The second reference effective value is the effective value corresponding to the fault waveform data recorded by the fault waveform recording device. The second reference effective value also includes the second effective value of current and the second effective value of voltage.

[0079] In this embodiment, see Figure 5 When a power grid fault occurs, not only can the target protection device record fault waveform data, but the fault waveform recording device can also record the fault waveform data corresponding to the target protection device. For a given target protection device, if there is no corresponding associated protection device, the relay protection fault information processing system can obtain the first waveform data generated by the target protection device and determine whether the fault waveform recording device has generated second waveform data. If no second waveform data has been generated and the data content is empty, the power grid fault type corresponding to the target protection device is determined to be a real power grid fault. If the fault waveform recording device has generated second waveform data, the first effective value of current and the first effective value of voltage are determined based on the first waveform data, and the second effective value of current and the second effective value of voltage are determined based on the second waveform data. Furthermore, the power grid fault type of the target protection device is determined based on the difference between the first effective value of current and the second effective value of current, and the difference between the first effective value of voltage and the second effective value of voltage.

[0080] Based on the above embodiments, determining the grid fault type of the target protection device based on the difference between the first reference effective value and the second reference effective value may include: pre-setting an effective value reference threshold; determining the difference between the first reference effective value and the second reference effective value; if the difference is less than the effective value reference threshold, then determining the grid fault type corresponding to the target protection device as a real grid fault.

[0081] The effective value reference threshold is a preset threshold, which includes the current reference threshold and the voltage reference threshold.

[0082] In this embodiment, current reference thresholds and voltage reference thresholds can be preset, for example, the current reference threshold is 0.1A and the voltage reference threshold is 0.1V. Further, a first difference is determined by subtracting the first effective current value from the second effective current value, for example, the first difference is 0.05A; a second difference is determined by subtracting the first effective voltage value from the second effective voltage value, for example, the second difference is 0.08A. Therefore, since the first difference of 0.05A is less than the current reference threshold of 0.1A, and the second difference of 0.08A is less than the voltage reference threshold of 0.1A, the power grid fault type corresponding to the target protection device is determined to be a real power grid fault. Otherwise, it is a simulated power grid fault.

[0083] It should be noted that determining the grid fault type corresponding to the target protection device based on the first waveform data, the second waveform data, and the reference threshold is mainly to determine whether the fault event reflected by the first waveform data and the fault event reflected by the second waveform data are the same fault event. That is, it can be understood that if the difference between the first reference effective value and the second reference effective value is less than a very small reference threshold, then the fault event reflected by the first waveform data and the fault event reflected by the second waveform data can be considered to be the same fault event, and thus the grid fault type corresponding to the target protection device can be determined to be a real grid fault.

[0084] The technical solution provided by this invention constructs a first topology diagram based on the relationship between protection devices in a primary bay within a power plant, and a second topology diagram based on the line connection information between power plants. Then, based on the first and second topology diagrams, a data association model is constructed. For each protection device, when a change in the status information of the protection device is detected, a target protection device is identified. Further, for each target protection device, associated protection devices are identified based on the timestamp of the current target protection device's state change and the status information of each protection device within a preset time period. Subsequently, it is determined whether an associated protection device exists. In this embodiment, if an associated protection device exists, the grid fault type of the target protection device is determined based on the data association model and the association relationship with the associated protection devices related to the target protection device. If no associated protection device exists, the grid fault type of the target protection device is determined based on the first waveform data generated by the target protection device and the second waveform data generated by the fault waveform device. This solves the technical problems of low accuracy in grid fault classification and low accuracy in fault archiving. By determining the fault type of the target protection device through multiple judgment conditions, it avoids the incorrect archiving of simulated grid faults, improves the accuracy of grid fault classification, and further enhances the accuracy of fault archiving.

[0085] Example 3

[0086] Figure 6 This is a schematic diagram of a power grid fault type determination device provided in Embodiment 3 of the present invention. This device can execute the power grid fault type determination method provided in this embodiment of the invention. The device includes: a topology diagram construction module 310, a data model construction module 320, a target device determination module 330, an associated device determination module 340, and a fault type determination module 350.

[0087] The topology diagram construction module 310 is used to construct a first topology diagram based on the association relationship between the protection devices corresponding to at least two primary bays within the plant, and to construct a second topology diagram based on the line connection information between at least two plants; wherein, a primary bay is an electrical unit composed of primary equipment, and each primary bay within the plant has a corresponding protection device, the protection device being used to protect the primary equipment in the primary bay;

[0088] The data model construction module 320 is used to construct a data association model based on the first topology diagram and the second topology diagram. The data association model includes information on each bus bay within the plant, information on the primary bays connected to different bus bays within the plant, information on the protection devices corresponding to the primary bays within the plant, and information on the protection devices on both sides of the same line between plants.

[0089] The target device determination module 330 is used to determine the protection device as a target protection device when the status information of the protection device changes from a first state to a second state; wherein the second state is at least one of an activation state or an operation state.

[0090] The associated device determination module 340 is used to determine the associated protection device associated with the current target protection device based on the timestamp when the current target protection device changes state and the state information of each protection device within a preset time period.

[0091] The fault type determination module 350 is used to determine the power grid fault type of the target protection device based on the first waveform data generated by the target protection device, the second waveform data generated by the fault waveform device, the data association model, and the association relationship of the associated protection devices associated with the target protection device; wherein, the power grid fault type includes real power grid faults or simulated power grid faults.

[0092] Based on the above technical solutions, the target device determination module 330 also includes a status information monitoring unit and a target device determination unit.

[0093] A status information monitoring unit is used to monitor the status information of each protection device within a preset area.

[0094] The target device determination unit is used to determine the protection device as a target protection device when the status information of the protection device is detected to change from a first state to a second state.

[0095] Based on the above technical solutions, the fault type determination module 350 also includes: a timestamp determination unit and a status information judgment unit.

[0096] The timestamp determination unit is used to determine the timestamp when the current target protection device changes state;

[0097] The status information judgment unit is used to determine whether the status information of each protection device has changed within a preset time period based on the timestamp; if the status information of the protection device has changed, it is regarded as an associated protection device related to the current target protection device; if the status information of the protection device has not changed, there is no associated protection device.

[0098] Based on the above technical solutions, the associated device determination module 340 also includes an associated device judgment unit.

[0099] The associated device determination unit is used to determine whether an associated protection device exists. If an associated protection device exists, the grid fault type of the target protection device is determined based on the data association model and the association relationship of the associated protection devices associated with the target protection device. If no associated protection device exists, the grid fault type of the target protection device is determined based on the first waveform data generated by the target protection device and the second waveform data generated by the fault waveform device.

[0100] Based on the above technical solutions, the associated device judgment unit is further configured to: determine, based on the data association model, whether the primary interval associated with the associated protection device and the target protection device is located on the same bus; if so, determine that the power grid fault type corresponding to the target protection device is a real power grid fault; if not, determine whether the associated protection device and the target protection device are protection devices on both sides of the same line, and determine the judgment result; based on the judgment result, determine the power grid fault type of the target protection device.

[0101] Based on the above technical solutions, if the judgment result is yes, then the power grid fault type corresponding to the target protection device is determined to be a real power grid fault; if the judgment result is no, then the power grid fault type of the target protection device is determined according to the first waveform data generated by the target protection device and the second waveform data generated by the fault waveform device.

[0102] Based on the above technical solutions, the associated device judgment unit is further configured to: determine whether the data content of the second waveform data is empty; if the data content of the second waveform data is empty, determine that the power grid fault type corresponding to the target protection device is a real power grid fault; if the data content of the second waveform data is not empty, determine a first reference effective value based on the first waveform data, and determine a second reference effective value based on the second waveform data; and determine the power grid fault type of the target protection device based on the difference between the first reference effective value and the second reference effective value.

[0103] Based on the above technical solutions, the associated device judgment unit also includes: a reference threshold determination subunit, an effective value difference determination subunit, and a power grid fault determination subunit.

[0104] The reference threshold determination subunit is used to preset the effective value reference threshold.

[0105] The effective value difference determination subunit is used to determine the difference between the first reference effective value and the second reference effective value;

[0106] The power grid fault determination subunit is used to determine the power grid fault type corresponding to the target protection device as the actual power grid fault if the difference is less than the effective value reference threshold.

[0107] The technical solution provided by this invention constructs a first topology diagram based on the relationship between protection devices in a primary bay within a power plant, and a second topology diagram based on the line connection information between power plants. A data association model is then constructed based on the first and second topology diagrams. For each protection device, when a change in the status information of the protection device is detected, a target protection device is determined. For each target protection device, associated protection devices are determined based on the timestamp of the current target protection device's state change and the status information of each protection device within a preset time period. The method is further refined based on the first waveform recording data of the target protection device, the second waveform recording data of the fault waveform recording device, the data association model, and the association relationship between the target protection device and the associated protection devices. This embodiment solves the technical problems of low accuracy in power grid fault classification and low accuracy in fault archiving, avoids erroneous archiving of simulated power grid faults, improves the accuracy of power grid fault classification, and enhances the accuracy of fault archiving.

[0108] The power grid fault type determination device provided in this disclosure can execute the power grid fault type determination method provided in any embodiment of this disclosure, and has the corresponding functional modules and beneficial effects of executing the method.

[0109] It is worth noting that the various units and modules included in the above-mentioned device are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, the specific names of each functional unit are only for easy differentiation and are not used to limit the protection scope of the embodiments of this disclosure.

[0110] Example 4

[0111] Figure 7 This is a schematic diagram of an electronic device provided in Embodiment 4 of the present invention. The electronic device 10 is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0112] like Figure 7 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0113] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0114] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the power grid fault type determination method.

[0115] In some embodiments, the power grid fault type determination method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the power grid fault type determination method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the power grid fault type determination method by any other suitable means (e.g., by means of firmware).

[0116] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0117] Computer programs used to implement the methods of the present invention can be written in any combination of one or more programming languages. These computer programs can be provided to the processor of a general-purpose computer, a special-purpose computer, or other programmable power grid fault type determination device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The computer programs can be executed entirely on a machine, partially on a machine, as a standalone software package partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0118] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0119] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0120] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0121] A computing system may include clients and servers. Clients and servers are generally geographically separated and typically interact via communication networks. The client-server relationship is established by computer programs running on the respective computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, a host product within the cloud computing service system, addressing the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability. It should be understood that various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solution of this invention are achieved, and this is not limited herein. The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for determining power grid fault types, characterized in that, include: A first topology diagram is constructed based on the association between the protection devices corresponding to at least two primary bays within the plant, and a second topology diagram is constructed based on the line connection information between at least two plants; wherein, a primary bay is an electrical unit composed of primary equipment, and each primary bay within the plant has a corresponding protection device, which is used to protect the primary equipment in the primary bay; Based on the first and second topology diagrams, a data association model is constructed. The data association model includes information on each bus bay within the plant, information on the primary bays connected to each bus bay within the plant, information on the protection devices corresponding to the primary bays within the plant, and information on the protection devices on both sides of the same line between plants. For each of the aforementioned protection devices, when the status information of the protection device is detected to change from a first state to a second state, the protection device is determined to be a target protection device; wherein, the second state is at least one of an activation state or an operation state; For each target protection device, based on the timestamp when the current target protection device changes state and the state information of each protection device within a preset time period, the associated protection device is determined to be related to the current target protection device. Based on the first waveform data generated by the target protection device, the second waveform data generated by the fault waveform device, the data association model, and the association relationships of the associated protection devices related to the target protection device, the power grid fault type of the target protection device is determined to be either a real power grid fault or a simulated power grid fault, including: Determine if any associated protection devices exist; If an associated protection device exists, the power grid fault type of the target protection device is determined based on the data association model and the association relationship of the associated protection devices associated with the target protection device. If no associated protection device exists, the power grid fault type of the target protection device is determined based on the first waveform data generated by the target protection device and the second waveform data generated by the fault waveform device.

2. The method according to claim 1, characterized in that, For each of the protection devices, when the status information of the protection device changes from a first state to a second state, determining the protection device as a target protection device includes: Within a preset monitoring area, the status information of each protection device is monitored; When the status information of the protection device changes from the first state to the second state, the protection device is determined to be the target protection device.

3. The method according to claim 1, characterized in that, For each target protection device, based on the timestamp of the current target protection device's state change and the state information of each protection device within a preset time period, the associated protection device is determined, including: Determine the timestamp when the current target protection device changes state; Based on the timestamp, determine whether the status information of each protection device has changed within a preset time period; If the status information of the protection device changes, it is considered as an associated protection device related to the current target protection device. If the status information of the protection device does not change, then there is no associated protection device.

4. The method according to claim 1, characterized in that, If an associated protection device exists, the power grid fault type of the target protection device is determined based on the data association model and the association relationship between the associated protection devices and the target protection device, including: Based on the data association model, it is determined whether the primary interval associated with the associated protection device and the target protection device is located on the same busbar; If so, then the power grid fault type corresponding to the target protection device is determined to be a real power grid fault; If not, determine whether the associated protection device and the target protection device are protection devices on both sides of the same line, and determine the judgment result; Based on the judgment result, the power grid fault type of the target protection device is determined.

5. The method according to claim 4, characterized in that, The determination of the power grid fault type of the target protection device based on the judgment result includes: If the judgment result is yes, then the power grid fault type corresponding to the target protection device is determined to be a real power grid fault; If the judgment result is negative, the power grid fault type of the target protection device is determined based on the first waveform data generated by the target protection device and the second waveform data generated by the fault waveform device.

6. The method according to claim 1, characterized in that, If no associated protection device exists, the power grid fault type of the target protection device is determined based on the first waveform data generated by the target protection device and the second waveform data generated by the fault waveform device, including: Determine whether the data content of the second waveform recording is empty; If the data content of the second waveform data is empty, then the power grid fault type corresponding to the target protection device is determined to be a real power grid fault; If the data content of the second waveform data is not empty, then a first reference valid value is determined based on the first waveform data, and a second reference valid value is determined based on the second waveform data. The power grid fault type of the target protection device is determined based on the difference between the first reference effective value and the second reference effective value.

7. The method according to claim 6, characterized in that, Determining the power grid fault type of the target protection device based on the difference between the first reference effective value and the second reference effective value includes: Pre-set a reference threshold for valid values; Determine the difference between the first reference valid value and the second reference valid value; If the difference is less than the effective value reference threshold, then the power grid fault type corresponding to the target protection device is determined to be the actual power grid fault.

8. A device for determining the type of power grid fault, characterized in that, include: The topology diagram construction module is used to construct a first topology diagram based on the association relationship between the protection devices corresponding to at least two primary bays within a plant, and to construct a second topology diagram based on the line connection information between at least two plants; wherein, a primary bay is an electrical unit composed of primary equipment, and each primary bay within a plant has a corresponding protection device, the protection device being used to protect the primary equipment in the primary bay; The data model construction module is used to construct a data association model based on the first topology diagram and the second topology diagram. The data association model includes information on each bus bay within the plant, information on the primary bays connected to different bus bays within the plant, information on the protection devices corresponding to the primary bays within the plant, and information on the protection devices on both sides of the same line between plants. The target device determination module is used to determine the protection device as a target protection device when the status information of the protection device changes from a first state to a second state; wherein the second state is at least one of an activation state or an operation state. The associated device determination module is used to determine the associated protection device associated with the current target protection device based on the timestamp when the current target protection device changes state and the state information of each protection device within a preset time period. The fault type determination module is used to determine whether the power grid fault type of the target protection device is a real power grid fault or a simulated power grid fault based on the first waveform data generated by the target protection device, the second waveform data generated by the fault waveform device, the data association model, and the association relationship of the associated protection devices associated with the target protection device. The associated device determination module further includes: an associated device judgment unit, used to determine whether an associated protection device exists; if an associated protection device exists, the grid fault type of the target protection device is determined according to the data association model and the association relationship of the associated protection devices associated with the target protection device; if no associated protection device exists, the grid fault type of the target protection device is determined according to the first waveform data generated by the target protection device and the second waveform data generated by the fault waveform device.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the power grid fault type determination method according to any one of claims 1-7.

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