Fault simulation method and device for power system, storage medium and electronic device

Abstract

The application discloses a power system fault simulation method and device, a storage medium and an electronic device. The method comprises the following steps: determining a power transmission line subset based on a power transmission line set matched with a power system, wherein the power transmission line set comprises a plurality of power transmission lines, and the power transmission line subset comprises part of the power transmission lines in the power transmission line set that meet a power transmission condition; determining a target power generation device that meets a fault occurrence condition from at least one power generation device cluster matched with the power transmission line subset, wherein each power generation device cluster comprises a plurality of power generation devices accessed by the power system; and performing a fault simulation operation on the target power generation device to obtain a fault simulation result of the power system. The application solves the technical problem of low fault simulation efficiency of the power system.

Description

Technical Field

[0001] This application relates to the field of power, and more specifically, to a method and apparatus for simulating power system faults, a storage medium, and electronic equipment. Background Technology

[0002] As the grid-connected capacity of new energy generating units continues to expand, the scale of power generation equipment connected to the power system continues to grow. This leads to a continuous decrease in the inertia of the power system, a reduction in its ability to withstand disturbances, and a greater susceptibility to stability problems such as oscillations. Enterprises often simulate potential severe power system failure scenarios to assess power system risks in order to better maintain the stable operation of the power system.

[0003] Existing power system fault simulation methods often exhaustively list different types of fault scenarios to screen for potential stability problems in the power system. However, these methods require determining the risk prediction results of the power system under multiple fault scenarios, which has drawbacks such as large computational load and long processing time, resulting in low efficiency in power system fault simulation.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This application provides a method and apparatus for simulating power system faults, a storage medium, and an electronic device to at least solve the technical problem of low efficiency in power system fault simulation.

[0006] According to one aspect of the embodiments of this application, a fault simulation method for a power system is provided, comprising: determining a subset of power transmission lines based on a set of power transmission lines matching the power system, wherein the set of power transmission lines includes multiple power transmission lines, and the subset of power transmission lines includes a portion of the power transmission lines in the set of power transmission lines that meet power transmission conditions; determining target power generation equipment that meets fault occurrence conditions from at least one cluster of power generation equipment matching the subset of power transmission lines, wherein each cluster of power generation equipment includes multiple power generation equipment connected to the power system; and performing fault simulation operations on the target power generation equipment to obtain fault simulation results for the power system.

[0007] According to another aspect of the embodiments of this application, a power system fault simulation device is also provided, comprising: a first determining unit, configured to determine a subset of power transmission lines based on a set of power transmission lines matching the power system, wherein the set of power transmission lines includes multiple power transmission lines, and the subset of power transmission lines includes a portion of the power transmission lines in the set of power transmission lines that meet power transmission conditions; a second determining unit, configured to determine target power generation equipment that meets fault occurrence conditions from at least one power generation equipment cluster that matches the subset of power transmission lines, wherein each power generation equipment cluster includes multiple power generation equipment connected to the power system; and a simulation unit, configured to perform fault simulation operations on the target power generation equipment to obtain fault simulation results of the power system.

[0008] According to another aspect of the embodiments of this application, a computer-readable storage medium is also provided, wherein a computer program is stored in the computer program, which is configured to execute the above-described power system fault simulation method at runtime.

[0009] According to another aspect of the embodiments of this application, a computer program product or computer program is provided, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the power system fault simulation method described above.

[0010] According to another aspect of the embodiments of this application, an electronic device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the above-described power system fault simulation method through the computer program.

[0011] In this embodiment, a subset of power transmission lines is determined based on a set of power transmission lines matching the power system. This subset includes multiple power transmission lines, and includes a portion of the power transmission lines that meet the power transmission conditions. Subsequently, target power generation equipment that meets the fault occurrence conditions is identified from at least one cluster of power generation equipment matching the power transmission line subset. Fault simulation operations are then performed on these target power generation equipment to obtain the power system fault simulation results. Based on the power transmission line subset of the power system, target power generation equipment that may fail is selected from the power generation equipment connected to the power system. By performing fault simulation operations on these target power generation equipment, the power system fault simulation is achieved. The rapid location mechanism of the target power generation equipment improves the efficiency of power system fault simulation, simplifies the operations required for the fault simulation process, and thus solves the technical problem of low efficiency in power system fault simulation. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0013] Figure 1 This is a schematic diagram of the application environment of an optional power system fault simulation method according to an embodiment of this application;

[0014] Figure 2 This is a flowchart of an optional power system fault simulation method according to an embodiment of this application;

[0015] Figure 3 This is a schematic diagram of an optional power system fault simulation method according to an embodiment of this application;

[0016] Figure 4 This is a flowchart of another optional power system fault simulation method according to an embodiment of this application;

[0017] Figure 5 This is a flowchart of another optional power system fault simulation method according to an embodiment of this application;

[0018] Figure 6 This is a schematic diagram of another optional power system fault simulation method according to an embodiment of this application;

[0019] Figure 7 This is a schematic diagram of another optional power system fault simulation method according to an embodiment of this application;

[0020] Figure 8 This is a schematic diagram of another optional power system fault simulation method according to an embodiment of this application;

[0021] Figure 9 This is a schematic diagram of the structure of an optional power system fault simulation device according to an embodiment of this application;

[0022] Figure 10 This is a schematic diagram of the structure of an optional electronic device according to an embodiment of this application. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented 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.

[0025] To better understand the technical solutions provided in the embodiments of this application, the key terms involved in the embodiments of this application will be introduced first:

[0026] Power flow: Power flow refers to the distribution and flow of voltage, active power, and reactive power at various nodes and along various branches of a power system when the system is operating stably. Power flow information can be used to analyze network power transmission paths and system operating status.

[0027] Tie lines: Tie lines are high-voltage transmission lines used to connect different areas of a power system to transmit active power.

[0028] Inertia: Inertia is a device parameter used to characterize the dynamic inertial response capability of power equipment such as synchronous generators and grid-type converters to resist changes in system frequency.

[0029] System critical section: The system critical section refers to the core transmission section in a power system, which is composed of several tie lines with the same power flow direction. Its power variation can be used to analyze the stability and oscillation characteristics of the power system.

[0030] According to an embodiment of this application, a fault simulation method for a power system is provided. This fault simulation method for a power system can be applied to, but is not limited to, [various applications]. Figure 1The application environment shown is a power system fault simulation system. This power system fault simulation system may include, but is not limited to, terminal device 102 and fault simulation server 104. As shown in steps S102 to S110, the terminal device sends circuit information related to a set of power transmission lines to the fault simulation server, where the set of power transmission lines matches the power system. After receiving the circuit information, the fault simulation server determines a subset of power transmission lines based on the set of power transmission lines matching the power system. This subset includes multiple power transmission lines, and includes a portion of the power transmission lines that meet the power transmission conditions. Subsequently, the fault simulation server determines the target power generation equipment that meets the fault occurrence conditions from at least one power generation equipment cluster that matches the power transmission line subset. Each power generation equipment cluster includes multiple power generation equipment connected to the power system. After identifying the target power generation equipment, the fault simulation server performs fault simulation operations on the target power generation equipment to obtain the fault simulation results of the power system, and feeds back the fault simulation results to the terminal equipment so that the terminal equipment can record, store or display the results of this fault simulation.

[0031] As an optional implementation method, such as Figure 2 As shown, the above-mentioned power system fault simulation method includes:

[0032] S202, Based on the set of power transmission lines that match the power system, a subset of power transmission lines is determined, wherein the set of power transmission lines includes multiple power transmission lines, and the subset of power transmission lines includes some power transmission lines in the set of power transmission lines that meet the power transmission conditions.

[0033] Optionally, the aforementioned power system can be an organic whole composed of multiple power devices with different functions, which can be used to realize the functions of power generation, transmission, and distribution. For example, the multiple power devices with different functions may include power generation equipment, power consumption equipment, power transformation equipment, power distribution equipment, etc.

[0034] Optionally, the aforementioned set of power transmission lines may include, but is not limited to, all power transmission lines related to the aforementioned power system, and power transmission information for each power transmission line. The aforementioned power transmission lines may be power system and related tie lines, and the aforementioned power transmission information may include information such as the voltage transmission level, power transmission direction, and historical line fault records for each power transmission line.

[0035] Optionally, the aforementioned subset of power transmission lines can be, but is not limited to, a subset obtained by dividing multiple power transmission lines in the power transmission line set based on the power transmission information of each power transmission line in the power transmission line set. It is understood that the aforementioned subset of power transmission lines can be critical sections of the power system, in order to more accurately identify the tie-line sections of the power system that are more prone to failure, avoiding the time-consuming problem of blind searching in exhaustive methods, and facilitating faster simulation of power system faults.

[0036] For example, a first-class power transmission line with the highest historical line failure rate can be identified from the set of power transmission lines; then, at least one second-class power transmission line with the same historical line failure rate as the first power transmission line, or a difference between the two that is less than a preset threshold, can be selected from the set of power transmission lines; the above-mentioned power transmission line subset may include the above-mentioned first-class power transmission line and the above-mentioned at least one second-class power transmission line.

[0037] For example, the third type of power transmission line with the highest voltage transmission level can be determined from the set of power transmission lines; then, at least one fourth type of power transmission line with the same power transmission direction as the third type of power transmission line can be selected from the set of power transmission lines; the above-mentioned power transmission line subset may include the above-mentioned third type of power transmission line and the above-mentioned at least one fourth type of power transmission line.

[0038] Optionally, the aforementioned power transmission conditions can be used to indicate that each power transmission line in the aforementioned power transmission line subset has the same power transmission information. For example, the power transmission conditions can be used to indicate that each power transmission line in the aforementioned power transmission line subset has the same power transmission direction. As another example, the power transmission conditions can be used to indicate that each power transmission line in the aforementioned power transmission line subset has the same voltage transmission level; for example, the voltage transmission level of each power transmission line is either "high" or "medium".

[0039] S204, from at least one cluster of power generation equipment that matches a subset of power transmission lines, identify target power generation equipment that meets the fault occurrence conditions, wherein each cluster of power generation equipment includes multiple power generation equipment connected to the power system.

[0040] Optionally, the above-mentioned at least one power generation equipment cluster can be obtained by classifying each power generation equipment according to the equipment attribute information of each power generation equipment in all power generation equipment connected to the power system, and the power generation equipment included in each power generation equipment cluster may have the same equipment attribute information.

[0041] As an alternative approach, the aforementioned at least one power generation equipment cluster can be obtained by classifying the power generation equipment according to the power flow direction of each equipment, with all power generation equipment in each cluster having the same power flow direction. For example, such as... Figure 3 As shown, power generation devices 1 to 7 are connected via six power transmission lines, including line 1 and line 2. For power generation devices 1, 2, 3, and 4, the power flow direction of each device can be determined based on the three power transmission lines (line 1, line 2, and line 3) that share the same power transmission direction: the power flow direction of power generation devices 1, 2, and 3 is the "power outflow direction," while the power flow direction of power generation device 4 is the "power inflow direction." Therefore, power generation devices 1, 2, and 3 can be grouped into the same power generation device cluster.

[0042] As another alternative, the above-mentioned at least one power generation equipment cluster can be obtained by classifying each power generation equipment according to the preset power generation range in which the power generation power of each power generation equipment is located, and the power generation power of each power generation equipment included in each power generation equipment cluster is located within the same preset power generation range.

[0043] Optionally, after identifying at least one power generation equipment cluster, candidate power generation equipment that meets the failure occurrence conditions can be screened in each power generation equipment cluster, and target power generation equipment can be further screened from the candidate power generation equipment in each power generation equipment cluster.

[0044] Optionally, the aforementioned fault occurrence conditions may, but are not limited to, referring to the predicted fault occurrence probability of the target power generation equipment reaching a preset probability threshold, or the target power generation equipment being the power generation equipment with the highest predicted fault occurrence probability among all power generation equipment connected to the power system. The aforementioned fault occurrence conditions can also be used to indicate that the target power generation equipment, when it fails, has the greatest impact on the operational stability of the power system.

[0045] It is understandable that the predicted probability of the aforementioned failure can be determined through the equipment attribute information of the power generation equipment. For example, the number of historical failures of each power generation equipment can be determined based on its historical failure records; the higher the number of historical failures, the higher the predicted probability of the failure of the power generation equipment; the power generation equipment with the highest number of historical failures in each power generation equipment cluster can be identified as a candidate power generation equipment, and the target power generation equipment can be identified as the power generation equipment with the highest number of historical failures among all candidate power generation equipment.

[0046] For example, the probability of failure for each power generation device can be determined based on its inertia. The smaller the inertia, the higher the probability of failure. The power generation device with the smallest inertia in each power generation device cluster can be identified as a candidate power generation device, while the target power generation device can be identified as the power generation device with the largest inertia among the candidate power generation devices.

[0047] S206, Perform a fault simulation operation on the target power generation equipment to obtain the fault simulation results of the power system.

[0048] Optionally, after identifying the target power generation equipment, a fault simulation strategy matching the target power generation equipment can be determined. This fault simulation strategy may include predefined fault simulation locations and fault simulation times. When performing the fault simulation operation, the fault simulation operation can be applied at the fault simulation location of the target power generation equipment according to the aforementioned fault simulation time to simulate the situation when the target power generation equipment experiences a fault, thereby determining the severity level of the stability problems that may occur in the power system when the target power generation equipment experiences a fault.

[0049] In the embodiments provided in this application, a subset of power transmission lines is determined based on a set of power transmission lines matching the power system. This subset includes multiple power transmission lines, and includes a portion of the power transmission lines that meet the power transmission conditions. Subsequently, target power generation equipment that meets the fault occurrence conditions is identified from at least one cluster of power generation equipment matching the power transmission line subset. Fault simulation operations are then performed on these target power generation equipment to obtain the power system fault simulation results. Based on the power transmission line subset of the power system, target power generation equipment that may fail is selected from the power generation equipment connected to the power system. By performing fault simulation operations on these target power generation equipment, the power system fault simulation is achieved. The rapid location mechanism of the target power generation equipment improves the efficiency of power system fault simulation, simplifies the operations required for the fault simulation process, and thus solves the technical problem of low efficiency in power system fault simulation.

[0050] As an optional implementation method, such as Figure 4 As shown, from at least one cluster of power generation equipment that matches a subset of power transmission lines, target power generation equipment that meets the fault occurrence conditions is identified, including:

[0051] S402, based on the multiple power transmission lines included in the power transmission line subset, divide the multiple power generation devices connected to the power system into at least one power generation device cluster.

[0052] S404 identifies the candidate power generation equipment for each power generation equipment cluster;

[0053] S406, selects the target power generation equipment from the candidate power generation equipment corresponding to each power generation equipment cluster.

[0054] Optionally, multiple power generation devices can be divided into multiple power generation device clusters based on the power transmission information of the power transmission lines included in the power transmission line subset. For example, the power flow direction of each power generation device (e.g., power inflow direction and power outflow direction) can be determined based on the power transmission direction of each power transmission line; the power generation devices connected to the power system can be divided into a first type of power generation device cluster and a second type of power generation device cluster, wherein the power flow direction of each power generation device in the first type of power generation device cluster is the "power inflow direction", and the power flow direction of each power generation device in the second type of power generation device cluster is the "power outflow direction".

[0055] Optionally, for each power generation equipment cluster, candidate power generation equipment can be obtained by identifying power generation equipment with a higher probability of failure or a greater impact from each power generation equipment cluster based on the equipment attribute information of each power generation equipment in the cluster. For example, the candidate power generation equipment could be the power generation equipment with the highest historical failure frequency in the cluster, or the power generation equipment with the lowest inertia in the cluster.

[0056] Optionally, the target power generation equipment can be the one with a higher probability of failure or a greater impact from failure among the candidate equipment. The probability of failure and the impact of failure can be characterized by the equipment attribute parameters of the power generation equipment. For example, the target power generation equipment could be the one with the highest historical failure frequency among the candidate power generation equipment, or the one with the largest inertia among the candidate power generation equipment.

[0057] The embodiments provided in this application divide multiple power transmission lines included in the power transmission line subset into at least one power generation equipment cluster, and after determining the candidate power generation equipment corresponding to each power generation equipment cluster, further filter out target power generation equipment from each candidate power generation equipment. This two-layer power generation equipment filtering mechanism more accurately filters out the target power generation equipment most likely to experience serious faults from the power generation equipment connected to the power system, thereby enabling more accurate and faster location of potential serious faults in the power system, improving fault simulation efficiency and accuracy.

[0058] As an optional implementation method, such as Figure 5 As shown, based on the multiple power transmission lines included in the power transmission line subset, the multiple power generation devices connected to the power system are divided into at least one power generation device cluster, including:

[0059] S502, based on the power transmission line subset, determine the power transmission direction of multiple power transmission lines included in the power transmission line subset, wherein the multiple power transmission lines in the power transmission line subset have the same power transmission direction.

[0060] S504, based on the direction of power transmission, determines the direction of power flow for each power generation device connected to the power system;

[0061] S506, based on the power flow direction corresponding to each power generation device, multiple power generation devices are divided into at least one power generation device cluster, wherein multiple power generation devices in each power generation device cluster have the same power flow direction.

[0062] Optionally, the aforementioned power transmission lines can be used to unidirectionally transmit active power from the power generation equipment side to the power consumption equipment side. Further, the power transmission direction of the aforementioned power transmission lines can refer to the transmission direction of the active power. It is understood that since the active power transmission method in the power system is unidirectional, and multiple power transmission lines in the power transmission line subset have the same power transmission direction, the power transmission direction determined based on the power transmission line subset is a single transmission direction.

[0063] Optionally, the aforementioned power flow direction can be used to indicate the active power transmission direction of each power generation device relative to the aforementioned power transmission direction. For example, if the power generation device is an active power inflow device, then the power flow direction is the "power inflow direction"; if the power generation device is an active power outflow device, then the power flow direction is the "power outflow direction".

[0064] Furthermore, after determining the direction of electrical energy flow for each power generation device, power generation devices with the same direction of electrical energy flow can be grouped into the same power generation device cluster. For example, based on whether the direction of electrical energy flow is "electrical energy outflow direction" or "electrical energy inflow direction," multiple power generation devices can be divided into a first type of power generation device cluster and a second type of power generation device cluster. In the first type of power generation device cluster, the direction of electrical energy flow for all power generation devices is "electrical energy inflow direction," while in the second type of power generation device cluster, the direction of electrical energy flow for all power generation devices is "electrical energy outflow direction."

[0065] As an optional implementation method, such as Figure 6 As shown, the five power generation devices 1 to 5 are connected by four power transmission lines, lines 1 to 4, and the power transmission direction of these four lines is the same. Based on the power transmission direction, the power flow direction of power generation devices 4 and 5 can be determined as the "power inflow direction," while the power flow direction of power generation devices 1, 2, and 3 is the "power outflow direction." Therefore, power generation devices 4 and 5 can be assigned to the following lines: Figure 7In the power generation equipment cluster 1 shown, power generation equipment 1, power generation equipment 2, and power generation equipment 3 are divided into the following groups: Figure 8 In the power generation equipment cluster 2 shown.

[0066] The embodiments provided in this application determine the power flow direction of each power generation device based on the power transmission direction of the power transmission lines included in the power transmission line subset. Then, based on the power flow direction of each power generation device, the power generation devices are classified to obtain at least one power generation device cluster. By dividing the power generation devices connected to the power system into various power generation device clusters corresponding to different power flow directions, it is beneficial to analyze the energy flow relationship between various power generation devices in the power system more accurately, thereby identifying the power generation device most likely to fail during the energy exchange process and improving the fault simulation accuracy of the power system.

[0067] As an optional implementation, candidate power generation equipment corresponding to each power generation equipment cluster is determined, including:

[0068] S1, obtain the device stability confidence of each power generation device included in each power generation device cluster, wherein the device stability confidence of each power generation device is used to indicate the duration of the power generation device maintaining a stable operating state;

[0069] S2, determine the candidate power generation equipment corresponding to each power generation equipment cluster if the equipment stability confidence level in each power generation equipment cluster meets the first confidence level threshold condition.

[0070] Optionally, the equipment stability confidence level of each power generation device can be obtained by acquiring the device attribute information. For example, historical fault occurrence records of the power generation device can be acquired, and the time interval between each historical fault can be determined based on these records. The aforementioned equipment stability confidence level can be represented by the maximum time interval among multiple time intervals corresponding to the power generation device. As another example, the inertia of the power generation device can be acquired. Since a smaller inertia results in a weaker disturbance rejection capability, the aforementioned equipment stability confidence level can be represented by the inertia of the power generation device. Furthermore, a smaller inertia results in a shorter stable operating time for the power generation device and a lower equipment stability confidence level.

[0071] Optionally, for each power generation equipment cluster, the aforementioned first confidence threshold condition may refer to the candidate power generation equipment being the power generation equipment with the lowest equipment stability confidence in the power generation equipment cluster, or the power generation equipment with the largest difference between the equipment stability confidence and the preset confidence in the power generation equipment cluster.

[0072] The embodiments provided in this application determine the candidate power generation equipment for each power generation equipment cluster based on the stability confidence of each power generation equipment in each power generation equipment cluster, thereby identifying the power generation equipment most likely to fail in each power generation equipment cluster. This achieves a preliminary screening mechanism for power generation equipment, narrows the fault location range of the power system, and improves the fault simulation efficiency of the power system.

[0073] As an optional implementation, the target power generation equipment is selected from the candidate power generation equipment corresponding to each power generation equipment cluster, including:

[0074] S1. Sort the candidate power generation equipment according to their respective equipment stability confidence levels to obtain the sorting results;

[0075] S2, Based on the ranking results, determine the power generation equipment whose equipment stability confidence level meets the second confidence level threshold condition from each candidate power generation equipment;

[0076] S3, the power generation equipment whose equipment stability confidence level meets the second confidence level threshold condition is identified as the target power generation equipment.

[0077] Optionally, the candidate power generation devices can be sorted in ascending order according to their equipment stability confidence level to obtain an ascending sort result, or in descending order to obtain a descending sort result.

[0078] As an optional approach, the aforementioned second confidence threshold condition can be used to indicate that the target power generation device is the power generation device with the highest device stability confidence among all candidate power generation devices. In ascending order, the target power generation device is the power generation device located at the end of the sorting result; in descending order, the target power generation device is the power generation device located at the first position of the sorting result.

[0079] As an alternative, the aforementioned second confidence threshold condition can be used to indicate that the target power generation device is the one with the smallest difference between the device stability confidence and the preset confidence threshold among all candidate power generation devices.

[0080] Through the embodiments provided in this application, after sorting the candidate power generation devices according to their respective equipment stability confidence levels, the power generation devices that meet the second confidence threshold condition are determined based on the sorting results, thereby obtaining the target power generation device. This realizes a secondary screening mechanism for each candidate power generation device, thereby further narrowing the fault location range of the power system and limiting the fault location of the power system to the target power generation device; the above solution not only improves the accuracy of power system fault simulation but also improves the efficiency of power system fault simulation.

[0081] As an optional implementation, a fault simulation operation is performed on the target power generation equipment to obtain fault simulation results of the power system, including:

[0082] S1, Obtain a fault simulation strategy that matches the target power generation equipment, wherein the fault simulation strategy includes the fault simulation location of the target power generation equipment and the execution time of the fault simulation operation;

[0083] S2, according to the execution time, performs a fault simulation operation at the fault simulation location of the target power generation equipment to obtain the fault simulation result.

[0084] Optionally, different power generation equipment can correspond to different fault simulation strategies; in other words, for different power generation equipment, the fault simulation time can be the same or different during the fault simulation operation, and the fault simulation location can be the same or different. For example, when the target power generation equipment is a synchronous generator, a three-phase transient short-circuit fault of 0.1 seconds can be applied at the bus outlet; when the target power generation equipment is a grid-type converter, a three-phase transient short-circuit fault of 0.1 seconds can be applied at the AC side grid connection point of the converter. As another example, when the target power generation equipment is a synchronous generator, a three-phase transient short-circuit fault of 0.1 seconds can be applied at the bus outlet; when the target power generation equipment is a grid-type converter, a three-phase transient short-circuit fault of 0.2 seconds can be applied at the bus outlet. As yet another example, when the target power generation equipment is a synchronous generator, a three-phase transient short-circuit fault of 0.1 seconds can be applied at the bus outlet; when the target power generation equipment is a grid-type converter, a three-phase transient short-circuit fault of 0.1 seconds can be applied at the bus outlet.

[0085] The embodiments provided in this application determine the corresponding fault simulation strategy based on the target power generation equipment, thereby enriching the fault simulation methods of the power system and obtaining more diverse fault simulation results.

[0086] As an optional implementation, a subset of power transmission lines is determined based on a set of power transmission lines that match the power system, including:

[0087] S1, obtain the voltage transmission level of each power transmission line in the power transmission line set;

[0088] S2, the power transmission lines in the power transmission line set whose voltage transmission level meets the voltage transmission conditions are identified as reference power transmission lines;

[0089] S3, according to the reference power transmission direction of the reference power transmission line, select at least one power transmission line from the set of power transmission lines that meets the power transmission conditions, wherein the power transmission conditions are used to indicate that the power transmission direction of each power transmission line in the at least one power transmission line is the same as the reference power transmission direction.

[0090] S4, integrate the reference power transmission line with at least one power transmission line to obtain a subset of power transmission lines.

[0091] Optionally, the aforementioned voltage transmission conditions can be used to indicate that the reference power transmission line is the power transmission line with the highest voltage transmission level in the set of power transmission lines. After determining the reference power transmission line, the power transmission direction of the reference power transmission line can be determined and designated as the reference power transmission direction.

[0092] Optionally, after determining the reference power transmission direction, at least one power transmission line with the same power transmission direction as the reference power transmission direction can be determined from the set of power transmission lines; or at least one power transmission line with the same power transmission direction as the reference power transmission direction and the same voltage transmission level can be determined from the set of power transmission lines. It is understood that the aforementioned subset of power transmission lines includes both the aforementioned reference power transmission line and the aforementioned at least one power transmission line.

[0093] Through the embodiments provided in this application, after identifying the reference power transmission line in the power transmission line set whose voltage transmission level meets the voltage transmission conditions, at least one power transmission line that meets the power transmission conditions can be selected from the power transmission line set according to the reference power transmission direction of the reference power transmission line, so as to obtain a power transmission subset containing at least one power transmission line and the reference power transmission line. This achieves local analysis of power transmission lines in the power system through the power transmission line selection mechanism, more accurately captures the power transmission area with a greater impact in the power system, and realizes rapid location of the power system fault simulation range.

[0094] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0095] According to another aspect of the embodiments of this application, a power system fault simulation apparatus for implementing the above-described power system fault simulation method is also provided. For example... Figure 9As shown, the device includes:

[0096] The first determining unit 902 is used to determine a subset of power transmission lines based on a set of power transmission lines that match the power system. The set of power transmission lines includes multiple power transmission lines, and the subset of power transmission lines includes a portion of the power transmission lines in the set of power transmission lines that meet the power transmission conditions.

[0097] The second determining unit 904 is used to determine the target power generation equipment that meets the fault occurrence conditions from at least one power generation equipment cluster that matches the power transmission line subset, wherein each power generation equipment cluster includes multiple power generation equipment connected to the power system.

[0098] The simulation unit 906 is used to perform fault simulation operations on the target power generation equipment in order to obtain the fault simulation results of the power system.

[0099] Optionally, the embodiments in this solution may be, but are not limited to, the embodiments of the reference method, which will not be described in detail here.

[0100] As an optional solution, the second determining unit 904 includes:

[0101] The partitioning module is used to divide multiple power transmission lines included in the power transmission line subset into at least one power generation equipment cluster.

[0102] The first determining module is used to determine the candidate power generation equipment corresponding to each power generation equipment cluster;

[0103] The first screening module is used to select target power generation equipment from the candidate power generation equipment corresponding to each power generation equipment cluster.

[0104] Optionally, the embodiments in this solution may be, but are not limited to, the embodiments of the reference method, which will not be described in detail here.

[0105] As an optional approach, the above-mentioned partitioning modules include:

[0106] The first determining submodule is used to determine the power transmission direction of multiple power transmission lines included in the power transmission line subset based on the power transmission line subset, wherein the multiple power transmission lines in the power transmission line subset have the same power transmission direction.

[0107] The second determining submodule is used to determine the direction of electrical energy flow for each power generation device connected to the power system based on the direction of electrical energy transmission.

[0108] The sub-module is used to divide multiple power generation devices into at least one power generation device cluster according to the power flow direction of each power generation device. In each power generation device cluster, multiple power generation devices have the same power flow direction.

[0109] Optionally, the embodiments in this solution may be, but are not limited to, the embodiments of the reference method, which will not be described in detail here.

[0110] As an optional solution, the first determining module mentioned above includes:

[0111] The acquisition submodule is used to acquire the device stability confidence of each power generation device included in each power generation device cluster. The device stability confidence of each power generation device is used to indicate the duration for which the power generation device maintains a stable operating state.

[0112] The third determination submodule is used to determine the power generation equipment in each power generation equipment cluster that meets the first confidence threshold condition and thus becomes the candidate power generation equipment for each power generation equipment cluster.

[0113] Optionally, the embodiments in this solution may be, but are not limited to, the embodiments of the reference method, which will not be described in detail here.

[0114] As an optional solution, the above-mentioned filtering module includes:

[0115] The sorting module is used to sort the candidate power generation devices according to their respective device stability confidence levels to obtain the sorting results;

[0116] The fourth determination submodule is used to determine, based on the sorting results, the power generation equipment whose equipment stability confidence level meets the second confidence level threshold condition from each candidate power generation equipment;

[0117] The fifth determination submodule is used to determine the power generation equipment whose equipment stability confidence level meets the second confidence level threshold condition as the target power generation equipment.

[0118] Optionally, the embodiments in this solution may be, but are not limited to, the embodiments of the reference method, which will not be described in detail here.

[0119] As an optional solution, the simulation unit 906 includes:

[0120] The first acquisition module is used to acquire a fault simulation strategy that matches the target power generation equipment. The fault simulation strategy includes the fault simulation location of the target power generation equipment and the execution time of the fault simulation operation.

[0121] The simulation module is used to perform fault simulation operations at the fault simulation location of the target power generation equipment according to the execution time, so as to obtain the fault simulation results.

[0122] Optionally, the embodiments in this solution may be, but are not limited to, the embodiments of the reference method, which will not be described in detail here.

[0123] As an optional solution, the first determining unit 902 includes:

[0124] The second acquisition module is used to acquire the voltage transmission level of each power transmission line in the power transmission line set;

[0125] The second determining module is used to determine the power transmission lines in the power transmission line set whose voltage transmission level meets the voltage transmission conditions as reference power transmission lines.

[0126] The second filtering module is used to filter at least one power transmission line from the set of power transmission lines that meets the power transmission conditions according to the reference power transmission direction of the reference power transmission line. The power transmission conditions are used to indicate that the power transmission direction of each power transmission line in the at least one power transmission line is the same as the reference power transmission direction.

[0127] An integration module is used to integrate a reference power transmission line with at least one power transmission line to obtain a subset of power transmission lines.

[0128] According to one aspect of this application, a computer-readable storage medium is provided, from which a processor of a computer device reads computer instructions, and the processor executes the computer instructions, causing the computer device to perform the method provided in various alternative implementations of the above-described power system fault simulation method.

[0129] Optionally, in this embodiment, the computer-readable storage medium may be configured to store a computer program for performing the following steps:

[0130] S1. Based on the set of power transmission lines that match the power system, a subset of power transmission lines is determined. The set of power transmission lines includes multiple power transmission lines, and the subset of power transmission lines includes some power transmission lines in the set of power transmission lines that meet the power transmission conditions.

[0131] S2, from at least one cluster of generating equipment that matches a subset of power transmission lines, identify target generating equipment that meets the fault occurrence conditions, wherein each cluster of generating equipment includes multiple generating equipment connected to the power system.

[0132] S3 performs a fault simulation operation on the target power generation equipment to obtain the fault simulation results of the power system.

[0133] According to one aspect of this application, a computer program product is provided, comprising a computer program / instructions containing program code for performing the above-described power system fault simulation method.

[0134] According to another aspect of the embodiments of this application, an electronic device for implementing the above-described power system fault simulation method is also provided. This electronic device may be... Figure 1 The terminal device or server shown. This embodiment uses the electronic device as a server as an example for illustration. Figure 10 As shown, the electronic device includes a memory 1002 and a processor 1004. The memory 1002 stores a computer program, and the processor 1004 is configured to execute the steps of any of the above method embodiments via the computer program.

[0135] Optionally, in this embodiment, the aforementioned electronic device may be located in at least one of a plurality of network devices in a computer network.

[0136] Optionally, in this embodiment, the processor can be configured to perform the following steps via a computer program:

[0137] S1. Based on the set of power transmission lines that match the power system, a subset of power transmission lines is determined. The set of power transmission lines includes multiple power transmission lines, and the subset of power transmission lines includes some power transmission lines in the set of power transmission lines that meet the power transmission conditions.

[0138] S2, from at least one cluster of generating equipment that matches a subset of power transmission lines, identify target generating equipment that meets the fault occurrence conditions, wherein each cluster of generating equipment includes multiple generating equipment connected to the power system.

[0139] S3 performs a fault simulation operation on the target power generation equipment to obtain the fault simulation results of the power system.

[0140] Alternatively, as those skilled in the art will understand, Figure 10 The structure shown is for illustrative purposes only. Electronic devices can also be smartphones (such as Android phones, iOS phones, etc.), tablets, PDAs, mobile internet devices (MIDs), PADs, and other terminal devices. Figure 10 This does not limit the structure of the aforementioned electronic devices. For example, the electronic device may also include components that are more... Figure 10 The more or fewer components shown (such as network interfaces, etc.), or having the same Figure 10 The different configurations shown.

[0141] The memory 1002 can be used to store software programs and modules, such as the program instructions / modules corresponding to the power system fault simulation method and device in this embodiment. The processor 1004 executes various functional applications and data processing by running the software programs and modules stored in the memory 1002, thereby realizing the aforementioned power system fault simulation method. The processor 1004 may include one or more processing cores, such as a 4-core processor or an 8-core processor. The processor 1004 can be implemented using at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), or PLA (Programmable Logic Array). The processor 1004 may also include a main processor and a coprocessor. The main processor is used to process data in the wake-up state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor 1004 may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, processor 1004 may further include an AI (Artificial Intelligence) processor for processing computational operations related to machine learning. Memory 1002 may include high-speed random access memory and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, memory 1002 may further include memory remotely located relative to processor 1004, which can be connected to the terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. Specifically, memory 1002 may be used, but is not limited to, for storing fault simulation results of a power system and power transmission information for each power transmission line in a set of power transmission lines. As an example, such as... Figure 10 As shown, the memory 1002 may include, but is not limited to, the first determining unit 902, the second determining unit 904, and the simulation unit 906 of the power system fault simulation device. Furthermore, it may include, but is not limited to, other module units of the power system fault simulation device, which will not be elaborated upon in this example.

[0142] Optionally, the aforementioned transmission device 1006 is used to receive or send data via a network. Specific examples of the network may include wired networks and wireless networks. In one example, the transmission device 1006 includes a Network Interface Controller (NIC), which can be connected to other network devices and routers via a network cable, thereby enabling communication with the Internet or a local area network (LAN). In another example, the transmission device 1006 is a radio frequency (RF) module, used to communicate with other terminals via at least one wireless communication protocol. This wireless communication protocol includes, but is not limited to: the World Wide Web, metropolitan area networks (MANs), intranets, various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks (WLANs), and / or WiFi (Wireless Fidelity) networks.

[0143] In addition, the aforementioned electronic device also includes a display screen 1008 for displaying a user interface (UI). This UI may include graphics, text, icons, videos, and any combination thereof. When the display screen 1008 is a touch screen, it also has the ability to collect touch signals on or above its surface. These touch signals can be input as control signals to the processor 1004 for processing. In this case, the display screen 1008 can also provide virtual buttons and / or a virtual keyboard, also known as soft buttons and / or a soft keyboard. The display screen 1008 can also be configured as a non-rectangular, irregular shape, i.e., a non-rectangular screen. The display screen 1008 can be made of materials such as LCD (Liquid Crystal Display) or OLED (Organic Light-Emitting Diode). Furthermore, the aforementioned electronic device also includes a connection bus 1010 for connecting the various module components within the electronic device.

[0144] In other embodiments, the aforementioned terminal device or server can be a node in a distributed system, wherein the distributed system can be a blockchain system, which is a distributed system formed by connecting multiple nodes through network communication. The nodes can form a point-to-point network, and any form of computing device, such as a server, terminal, or other electronic device, can become a node in the blockchain system by joining this point-to-point network.

[0145] Optionally, in embodiments of this application, the terms "module" or "unit" refer to a computer program or part of a computer program that has a predetermined function and works with other related parts to achieve a predetermined goal, and can be implemented wholly or partially using software, hardware (such as processing circuitry or memory), or a combination thereof. Similarly, a processor (or multiple processors or memory) can be used to implement one or more modules or units. Furthermore, each module or unit can be part of an overall module or unit that includes the functionality of that module or unit.

[0146] Optionally, in this embodiment, those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing the hardware related to the terminal device. The program can be stored in a computer-readable storage medium, which may include: flash drive, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0147] If the integrated units in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in the aforementioned computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause one or more computer devices (which may be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0148] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0149] In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between units or modules, and may be electrical or other forms.

[0150] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0151] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0152] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A fault simulation method for a power system, characterized in that, include: Based on the set of power transmission lines that match the power system, a subset of power transmission lines is determined. The set of power transmission lines includes multiple power transmission lines, and the subset of power transmission lines includes a portion of the power transmission lines in the set that meet the power transmission conditions. From at least one cluster of power generation equipment that matches the subset of power transmission lines, target power generation equipment that meets the fault occurrence conditions is identified, wherein each cluster of power generation equipment includes multiple power generation equipment connected to the power system. A fault simulation operation is performed on the target power generation equipment to obtain the fault simulation results of the power system.

2. The method according to claim 1, characterized in that, The step of identifying target power generation equipment that meets the fault occurrence conditions from at least one cluster of power generation equipment that matches the subset of power transmission lines includes: Based on the multiple power transmission lines included in the power transmission line subset, the multiple power generation devices connected to the power system are divided into at least one power generation device cluster. Identify the candidate power generation equipment corresponding to each of the power generation equipment clusters; The target power generation equipment is selected from the candidate power generation equipment corresponding to each of the power generation equipment clusters.

3. The method according to claim 2, characterized in that, The step of dividing the multiple power transmission lines included in the power transmission line subset into at least one power generation equipment cluster includes: Based on the subset of power transmission lines, determine the power transmission direction of multiple power transmission lines included in the subset of power transmission lines, wherein the multiple power transmission lines in the subset of power transmission lines have the same power transmission direction. Based on the direction of power transmission, the direction of power flow corresponding to each of the power generation devices connected to the power system is determined. Based on the power flow direction corresponding to each of the power generation devices, the multiple power generation devices are divided into at least one power generation device cluster, wherein the multiple power generation devices in each power generation device cluster have the same power flow direction.

4. The method according to claim 2, characterized in that, The process of determining the candidate power generation equipment corresponding to each power generation equipment cluster includes: Obtain the device stability confidence level of each of the power generation devices included in each power generation device cluster, wherein the device stability confidence level of each power generation device is used to indicate the duration for which the power generation device maintains a stable operating state; The power generation equipment in each power generation equipment cluster whose equipment stability confidence level meets the first confidence level threshold condition is determined as the candidate power generation equipment corresponding to each power generation equipment cluster.

5. The method according to claim 4, characterized in that, The step of selecting the target power generation equipment from the candidate power generation equipment corresponding to each of the power generation equipment clusters includes: The candidate power generation devices are ranked according to their respective device stability confidence levels to obtain a ranking result; Based on the sorting results, power generation equipment whose stability confidence level meets the second confidence threshold condition is determined from each of the candidate power generation equipment; The power generation equipment whose stability confidence level meets the second confidence level threshold condition is identified as the target power generation equipment.

6. The method according to claim 1, characterized in that, The step of performing a fault simulation operation on the target power generation equipment to obtain the fault simulation results of the power system includes: Obtain a fault simulation strategy that matches the target power generation equipment, wherein the fault simulation strategy includes the fault simulation location of the target power generation equipment and the execution time of the fault simulation operation; According to the execution time, the fault simulation operation is performed at the fault simulation location of the target power generation equipment to obtain the fault simulation result.

7. The method according to claim 1, characterized in that, The subset of power transmission lines determined based on the set of power transmission lines matched with the power system includes: Obtain the voltage transmission level of each power transmission line in the power transmission line set; The power transmission lines in the power transmission line set whose voltage transmission level meets the voltage transmission conditions are identified as reference power transmission lines. According to the reference power transmission direction of the reference power transmission line, at least one power transmission line that satisfies the power transmission condition is selected from the set of power transmission lines, wherein the power transmission condition is used to indicate that the power transmission direction of each power transmission line in the at least one power transmission line is the same as the reference power transmission direction. By integrating the reference power transmission line with the at least one power transmission line, a subset of power transmission lines is obtained.

8. A fault simulation device for a power system, characterized in that, include: The first determining unit is used to determine a subset of power transmission lines based on a set of power transmission lines that match the power system, wherein the set of power transmission lines includes multiple power transmission lines, and the subset of power transmission lines includes a portion of the power transmission lines in the set of power transmission lines that meet the power transmission conditions. The second determining unit is configured to determine, from at least one cluster of generating equipment that matches the subset of power transmission lines, a target generating equipment that meets the fault occurrence conditions, wherein each cluster of generating equipment includes multiple generating equipment connected to the power system. The simulation unit is used to perform fault simulation operations on the target power generation equipment to obtain the fault simulation results of the power system.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein the program is executed by a processor to perform the method described in any one of claims 1 to 7.

10. A computer program product comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the method according to any one of claims 1 to 7.

11. An electronic device comprising a memory and a processor, characterized in that, The memory stores a computer program, and the processor is configured to execute the method described in any one of claims 1 to 7 through the computer program.

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