Method, device and computer device for determining commutation failure defense capability information

Abstract

The application relates to a commutation failure defense capability information determination method and device and a computer device. The method comprises the following steps: acquiring voltage drop modes and voltage drop depths of each electrical node of an alternating current power grid, structure data information of each structure information of the alternating current power grid, and system parameters of a commutation failure defense system, and constructing a power grid structure model of the alternating current power grid and a commutation failure defense structure model of the alternating current power grid; based on the voltage drop modes and the voltage drop depths of each electrical node, a simulation working condition list of the electrical node is constructed, and based on the simulation working condition list, a first commutation record information first commutation failure probability of the power grid structure model and a second commutation record information second commutation failure probability of the commutation failure defense structure model are simulated, so as to identify commutation failure defense capability information of the commutation failure defense system. The method can improve the precision of evaluating the commutation failure defense capability information of the commutation failure defense system.

Description

Technical Field

[0001] The present application relates to the technical field of high-voltage direct current transmission, and in particular to a method, device, and computer equipment for determining commutation failure defense capability information. Background Art

[0002] Commutation failure is an inherent risk factor in HVDC transmission technology and one of the most common faults encountered during HVDC project operation. When a commutation failure occurs, the AC and DC voltages at the converter station drop, current overcurrent occurs, and the transmitted DC power decreases. This causes large power fluctuations in both the transmitting and receiving power grids, impacting grid safety. To address commutation failure, several technical solutions have been proposed, including power control based on commutation failure prediction, novel commutation topologies using IGBT (Insulated Gate Bipolar Transistor) auxiliary valves, and novel commutation valves based on IGCT (Integrated Gate Commutated Thyristors) devices. However, due to the inability to directly detect the probability of commutation failure, it is difficult to determine the effectiveness of these technical solutions in mitigating commutation failures. Therefore, determining the probability of commutation failure is a current research priority.

[0003] The current method for detecting the probability of commutation failure uses voltage drops on the receiving AC grid as a basis for predicting commutation failure. Specifically, if the voltage of the AC grid where the inverter station is located drops, the system is considered likely to have experienced a commutation failure, and this is then used to determine whether the system has experienced a commutation failure. However, commutation failure can still occur even when the AC voltage is distorted but the effective value does not drop significantly. Therefore, simply detecting voltage drops to identify system commutation failure has significant limitations, resulting in low accuracy in evaluating the commutation failure resistance of a commutation failure prevention system. Summary of the Invention

[0004] Based on this, it is necessary to provide a method, device, computer equipment, computer-readable storage medium and computer program product for determining commutation failure defense capability information to address the above technical issues.

[0005] In a first aspect, the present application provides a method for determining commutation failure defense capability information. The method comprises:

[0006] Acquiring various voltage drop modes of electrical nodes of an AC power grid, voltage drop depths of the electrical nodes, structural data information of various structural information of the AC power grid, and system parameters of a commutation failure resistance system, and constructing a grid structure model of the AC power grid and a commutation failure resistance structural model of the AC power grid based on the various structural information of the AC power grid and the system parameters of the commutation failure resistance system;

[0007] Constructing a simulation operating condition list for the electrical node based on each voltage drop mode and each voltage drop depth of the electrical node, and simulating the operation process of the power grid structure model and the commutation failure resistance structure model based on the simulation operating condition list to obtain first commutation record information of the power grid structure model and second commutation record information of the commutation failure resistance structure model;

[0008] A first commutation failure probability of the first commutation record information and a second commutation failure probability of the second commutation record information are respectively calculated, and commutation failure defense capability information of the commutation failure defense system is identified based on the first commutation failure probability and the second commutation failure probability.

[0009] Optionally, constructing a grid structure model of the AC grid and a commutation failure resistance structure model of the AC grid based on various structural information of the AC grid and system parameters of the commutation failure resistance system includes:

[0010] In response to a user's commutation failure structure upload operation, target structure information related to the commutation failure is selected from various structural information of the AC power grid, and a grid structure model of the AC power grid is constructed based on the target structure information;

[0011] The configuration information of the commutation failure resistance system in the AC power grid and the connection mode of the connection structure information of the commutation failure resistance system between the AC power grids are collected, and based on the configuration information and the connection mode of the connection structure information, the system parameters of the commutation failure resistance system are added to the power grid structure model to obtain the commutation failure resistance structure model of the AC power grid.

[0012] Optionally, constructing a simulation operating condition list of the electrical node based on each voltage drop mode and each voltage drop depth of the electrical node includes:

[0013] Based on the voltage drop modes of the electrical nodes, identifying the fault type corresponding to each voltage drop mode, and clustering the voltage drop modes according to the fault type to obtain a plurality of drop mode groups;

[0014] Identifying the fault phase of each voltage sag mode in each sag mode group, and sorting the voltage sag modes in each sag mode group in ascending order of the fault phase to obtain a first voltage sag sequence for each sag mode group;

[0015] The voltage drop depths of the electrical nodes are sorted in ascending order to obtain a second voltage drop sequence, and the first voltage drop sequences and the second voltage drop sequences are permuted and combined to obtain a simulation operating condition list of the electrical nodes.

[0016] Optionally, simulating the operation process of the power grid structure model and the commutation failure resistance structure model based on the simulation operating condition list to obtain first commutation record information of the power grid structure model and second commutation record information of the commutation failure resistance structure model includes:

[0017] Collecting historical operating data information of the power grid structure model, and identifying fault operating condition information obtained by combining each voltage drop mode and each voltage drop depth in the simulation operating condition list;

[0018] Inputting the historical operating data information and the simulation operating condition list into the power grid structure model, simulating each fault operating condition information respectively, obtaining simulation results of the power grid structure model for each fault operating condition information, and identifying commutation result information corresponding to the simulation results;

[0019] Fill each commutation result information into the simulation condition list according to the fault condition information corresponding to the commutation result information, to obtain the first commutation record information of the power grid structure model;

[0020] The commutation failure resistance structural model is used as the power grid structure model, and the historical operation data information and the simulation operating condition list are input into the power grid structure model, each fault operating condition information is simulated respectively, and the simulation result step of the power grid structure model for each fault operating condition information is obtained to obtain the second commutation record information of the commutation failure resistance structural model.

[0021] Optionally, respectively calculating a first commutation failure probability of the first commutation record information and a second commutation failure probability of the second commutation record information includes:

[0022] Filtering the commutation failure record information whose commutation result information is commutation failure from the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, and identifying the number of the commutation failure record information;

[0023] Dividing the number of the commutation failure record information by the number of all fault condition information to obtain a first commutation failure probability of the first commutation record information;

[0024] The second commutation record information is used as the first commutation record information, and the step of filtering commutation failure record information whose commutation result information indicates commutation failure is performed again in the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, thereby obtaining a second commutation failure probability of the second commutation record information.

[0025] Optionally, the identifying, based on the first commutation failure probability and the second commutation failure probability, commutation failure defense capability information of the commutation failure defense system includes:

[0026] In a historical power grid operation database, searching for a first target fault condition including commutation result information in each fault condition information of the simulation condition list when there is no commutation failure protection system, and using the commutation result information of the first target fault condition as first actual commutation information of each first target fault condition;

[0027] In the historical power grid operation database, when a commutation failure mitigation system is present, searching for a second target fault condition including commutation result information in each fault condition information of the simulation condition list, and using the commutation result information of the second target fault condition as the second actual commutation information of each second target fault condition;

[0028] Based on the first actual commutation information of each of the first target fault conditions, adjusting the first commutation failure probability of the first commutation record information to obtain a first target commutation failure probability; and based on the second actual commutation information of each of the first target fault conditions, adjusting the first commutation failure probability of the second commutation record information to obtain a second target commutation failure probability;

[0029] Based on the first target commutation failure probability and the second target commutation failure probability, commutation failure defense capability information of the commutation failure defense system is calculated using a defense capability algorithm.

[0030] In a second aspect, the present application further provides a device for determining commutation failure defense capability information. The device comprises:

[0031] an acquisition module, configured to acquire voltage drop modes of electrical nodes of an AC power grid, voltage drop depths of the electrical nodes, structural data information of structural information of the AC power grid, and system parameters of a commutation failure resistance system, and construct a power grid structure model of the AC power grid and a commutation failure resistance structure model of the AC power grid based on the structural information of the AC power grid and the system parameters of the commutation failure resistance system;

[0032] a simulation module configured to construct a simulation operating condition list for the electrical node based on each voltage drop mode and each voltage drop depth of the electrical node, and simulate the operation process of the power grid structure model and the commutation failure resistance structure model based on the simulation operating condition list, respectively, to obtain first commutation record information of the power grid structure model and second commutation record information of the commutation failure resistance structure model;

[0033] an identification module, configured to respectively calculate a first commutation failure probability of the first commutation record information and a second commutation failure probability of the second commutation record information, and identify commutation failure defense capability information of the commutation failure defense system based on the first commutation failure probability and the second commutation failure probability.

[0034] Optionally, the acquisition module is specifically configured to:

[0035] In response to a user's commutation failure structure upload operation, target structure information related to the commutation failure is selected from various structural information of the AC power grid, and a grid structure model of the AC power grid is constructed based on the target structure information;

[0036] The configuration information of the commutation failure resistance system in the AC power grid and the connection mode of the connection structure information of the commutation failure resistance system between the AC power grids are collected, and based on the configuration information and the connection mode of the connection structure information, the system parameters of the commutation failure resistance system are added to the power grid structure model to obtain the commutation failure resistance structure model of the AC power grid.

[0037] Optionally, the simulation module is specifically used to:

[0038] Based on the voltage drop modes of the electrical nodes, identifying the fault type corresponding to each voltage drop mode, and clustering the voltage drop modes according to the fault type to obtain a plurality of drop mode groups;

[0039] Identifying the fault phase of each voltage sag mode in each sag mode group, and sorting the voltage sag modes in each sag mode group in ascending order of the fault phase to obtain a first voltage sag sequence for each sag mode group;

[0040] The voltage drop depths of the electrical nodes are sorted in ascending order to obtain a second voltage drop sequence, and the first voltage drop sequences and the second voltage drop sequences are permuted and combined to obtain a simulation operating condition list of the electrical nodes.

[0041] Optionally, the simulation module is specifically used to:

[0042] Collecting historical operating data information of the power grid structure model, and identifying fault operating condition information obtained by combining each voltage drop mode and each voltage drop depth in the simulation operating condition list;

[0043] Inputting the historical operating data information and the simulation operating condition list into the power grid structure model, simulating each fault operating condition information respectively, obtaining simulation results of the power grid structure model for each fault operating condition information, and identifying commutation result information corresponding to the simulation results;

[0044] Fill each commutation result information into the simulation condition list according to the fault condition information corresponding to the commutation result information, to obtain the first commutation record information of the power grid structure model;

[0045] The commutation failure resistance structural model is used as the power grid structure model, and the historical operation data information and the simulation operating condition list are input into the power grid structure model, each fault operating condition information is simulated respectively, and the simulation result step of the power grid structure model for each fault operating condition information is obtained to obtain the second commutation record information of the commutation failure resistance structural model.

[0046] Optionally, the identification module is specifically configured to:

[0047] Filtering the commutation failure record information whose commutation result information is commutation failure from the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, and identifying the number of the commutation failure record information;

[0048] Dividing the number of the commutation failure record information by the number of all fault condition information to obtain a first commutation failure probability of the first commutation record information;

[0049] The second commutation record information is used as the first commutation record information, and the step of filtering commutation failure record information whose commutation result information indicates commutation failure is performed again in the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, thereby obtaining a second commutation failure probability of the second commutation record information.

[0050] Optionally, the identification module is specifically configured to:

[0051] In a historical power grid operation database, searching for a first target fault condition including commutation result information in each fault condition information of the simulation condition list when there is no commutation failure protection system, and using the commutation result information of the first target fault condition as first actual commutation information of each first target fault condition;

[0052] In the historical power grid operation database, when a commutation failure mitigation system is present, searching for a second target fault condition including commutation result information in each fault condition information of the simulation condition list, and using the commutation result information of the second target fault condition as the second actual commutation information of each second target fault condition;

[0053] Based on the first actual commutation information of each of the first target fault conditions, adjusting the first commutation failure probability of the first commutation record information to obtain a first target commutation failure probability; and based on the second actual commutation information of each of the first target fault conditions, adjusting the first commutation failure probability of the second commutation record information to obtain a second target commutation failure probability;

[0054] Based on the first target commutation failure probability and the second target commutation failure probability, commutation failure defense capability information of the commutation failure defense system is calculated using a defense capability algorithm.

[0055] In a third aspect, the present application provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of any one of the methods described in the first aspect when executing the computer program.

[0056] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of any one of the methods in the first aspect.

[0057] In a fifth aspect, the present application provides a computer program product, wherein the computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of any one of the methods in the first aspect are implemented.

[0058] The above-mentioned method, device, and computer equipment for determining commutation failure defense capability information obtains each voltage drop mode of an electrical node of an AC power grid, each voltage drop depth of the electrical node, structural data information of each structural information of the AC power grid, and system parameters of a commutation failure defense system, and constructs a grid structure model of the AC power grid and a commutation failure defense structure model of the AC power grid based on the each structural information of the AC power grid and the system parameters of the commutation failure defense system; constructs a simulation operating condition list of the electrical node based on each voltage drop mode and each voltage drop depth of the electrical node, and simulates the operation process of the grid structure model and the commutation failure defense structure model based on the simulation operating condition list to obtain first commutation record information of the grid structure model and second commutation record information of the commutation failure defense structure model; calculates a first commutation failure probability of the first commutation record information and a second commutation failure probability of the second commutation record information, and identifies the commutation failure defense capability information of the commutation failure defense system based on the first commutation failure probability and the second commutation failure probability. By constructing a power grid structure model and a commutation failure resistance structure model, the operating conditions of electrical nodes under various voltage drop modes and voltage drop depths are simulated, resulting in first commutation record information for the power grid structure model and second commutation record information for the commutation failure resistance structure model. The commutation failure probability of each commutation record is then calculated to identify the commutation failure resistance capability of the commutation failure resistance system. This not only improves the accuracy of commutation failure probability detection through intelligent simulation, but also analyzes the commutation failure resistance capability of the commutation failure resistance system by simulating the commutation record information of the electrical nodes that are the main cause of commutation failure under different voltage drop modes and voltage drop depths. This improves the pertinence and comprehensiveness of the commutation failure resistance capability analysis, thereby comprehensively improving the accuracy of the commutation failure resistance capability evaluation of the commutation failure resistance system. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 1 is a flow chart of a method for determining commutation failure defense capability information in one embodiment;

[0060] Figure 2 A schematic diagram of first commutation recording information in one embodiment;

[0061] Figure 3 A schematic diagram of first commutation recording information in one embodiment;

[0062] Figure 4 1 is a flow chart illustrating an example of determining commutation failure defense capability information in one embodiment;

[0063] Figure 5 is a structural block diagram of a device for determining commutation failure defense capability information in one embodiment;

[0064] Figure 6 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0066] The method for determining the commutation failure defense capability information provided in the embodiment of the present application can be applied to the application environment of the commutation failure probability prediction of the high-voltage direct current power grid. The method can be applied to a terminal, a server, or a system including a terminal and a server, and is implemented through the interaction between the terminal and the server. The terminal can be, but is not limited to, various personal computers, laptops, smart phones, tablet computers, etc. The server can be implemented as an independent server or a server cluster composed of multiple servers. The terminal constructs a power grid structure model and a commutation failure resistance structure model to simulate the operation of the electrical node in various voltage drop modes and voltage drop depths, thereby obtaining the first commutation record information of the power grid structure model and the second commutation record information of the commutation failure resistance structure model. Then, by calculating the commutation failure probability of each commutation record information separately, the commutation failure defense capability information of the commutation failure resistance system is identified. Not only is the accuracy of detecting the commutation failure probability improved through intelligent simulation, but also by simulating the commutation record information of the electrical nodes that are the main cause of the commutation failure in different voltage drop modes and different voltage drop depths, the commutation failure defense capability information of the commutation failure resistance system is analyzed, which improves the pertinence and comprehensiveness of the analysis of the commutation failure defense capability information, thereby comprehensively improving the accuracy of evaluating the commutation failure resistance capability information of the commutation failure resistance system.

[0067] In one embodiment, Figure 1 As shown, a method for determining commutation failure defense capability information is provided, which is described by taking the method applied to a terminal as an example, including the following steps:

[0068] Step S101: Acquire various voltage drop modes and voltage drop depths of electrical nodes of the AC power grid, structural data information of various structural information of the AC power grid, and system parameters of a commutation failure resistance system. Based on the various structural information of the AC power grid and the system parameters of the commutation failure resistance system, construct a grid structure model of the AC power grid and a commutation failure resistance structure model of the AC power grid.

[0069] In this embodiment, in response to a user's upload of electrical node information, the terminal obtains voltage drop modes and voltage drop depths for each electrical node in the AC power grid, structural data for each component of the AC power grid's structural information, and system parameters for the commutation failure mitigation system. Voltage drop modes include those corresponding to single-phase ground faults, two-phase ground faults, two-phase interphase short circuit faults, and three-phase short circuit faults. Voltage drop depths range from 90% to 10% of the rated voltage, with a voltage drop depth set for each 10% drop within this range. The structural data for each component of the AC power grid's structural information includes structural data for the AC busbars of the DC transmission inverter station within the AC power grid and structural data for each electrical node in the AC power grid where the inverter station is located. The commutation failure mitigation system is a system structure installed in the AC power grid to control the AC power grid and reduce commutation failures. The system structure can be a system structure generated by technical solutions such as power control based on commutation failure prediction, a new commutation topology based on IGBT auxiliary valves, and a new commutation valve based on IGCT devices. Commutation failure refers to the situation where the commutation valve in the AC power grid does not perform commutation according to the commutation law. Then, based on the various structural information of the AC power grid and the system parameters of the commutation failure resistance system, the terminal constructs a grid structure model of the AC power grid and a structural model for resisting commutation failure of the AC power grid. The grid structure model does not include the system parameters corresponding to the commutation failure resistance system, and the structural model for resisting commutation failure includes the system parameters corresponding to the commutation failure resistance system. The specific construction process will be described in detail later.

[0070] Step S102: Based on the voltage drop modes and voltage drop depths of the electrical nodes, a simulation operating condition list of the electrical nodes is constructed. Based on the simulation operating condition list, the operation process of the power grid structure model and the commutation failure resistance structure model are simulated respectively to obtain the first commutation record information of the power grid structure model and the second commutation record information of the commutation failure resistance structure model.

[0071] In this embodiment, the terminal arranges and combines the acquired voltage drop modes and voltage drop depths of the electrical nodes in a specific order to construct a simulated operating condition list for the electrical nodes. The simulated operating condition list contains fault operating condition information for the electrical nodes, including the arranged combinations of voltage drop modes and voltage drop depths. The terminal simulates the operation of each fault operating condition using the power grid structure model and the commutation failure resistance structure model, thereby detecting the first commutation record information of the power grid structure model and the second commutation record information of the commutation failure resistance structure model. The specific simulation process will be described in detail later.

[0072] Step S103 , respectively calculating a first commutation failure probability of the first commutation record information and a second commutation failure probability of the second commutation record information, and identifying commutation failure defense capability information of the commutation failure defense system based on the first commutation failure probability and the second commutation failure probability.

[0073] In this embodiment, the terminal calculates the ratio of the number of commutation failures in the first commutation record information to the number of all fault condition information to obtain the first commutation failure probability, and then calculates the ratio of the number of commutation failures in the second commutation record information to the number of all fault condition information to obtain the second commutation failure probability. Then, the terminal calculates 1 minus the ratio between the second commutation failure probability and the first commutation failure probability to obtain the commutation failure defense capability information of the commutation failure defense system.

[0074] Based on the above scheme, by constructing a power grid structure model and a commutation failure resistance structure model, the operating conditions of electrical nodes under various voltage drop modes and voltage drop depths are simulated, thereby obtaining first commutation record information for the power grid structure model and second commutation record information for the commutation failure resistance structure model. Then, by calculating the commutation failure probability for each commutation record information, the commutation failure resistance capability information of the commutation failure resistance system is identified. This not only improves the accuracy of commutation failure probability detection through intelligent simulation, but also analyzes the commutation failure resistance capability information of the commutation failure resistance system by simulating the commutation record information of the electrical nodes that are the main cause of commutation failure under different voltage drop modes and voltage drop depths. This improves the pertinence and comprehensiveness of the commutation failure resistance capability analysis, thereby comprehensively improving the accuracy of the commutation failure resistance capability evaluation of the commutation failure resistance system.

[0075] Optionally, based on the various structural information of the AC power grid and the system parameters of the phase-commutation failure resistance system, a grid structure model of the AC power grid and a structural model of the AC power grid that resists phase-commutation failure are constructed, including: in response to the user's phase-commutation failure structure upload operation, screening target structural information related to phase-commutation failure from the various structural information of the AC power grid, and constructing the grid structure model of the AC power grid based on the target structural information; collecting the configuration information of the phase-commutation failure resistance system in the AC power grid and the connection method of the connection structure information of the phase-commutation failure resistance system between the AC power grids, and based on the configuration information and the connection method of the connection structure information, adding the system parameters of the phase-commutation failure resistance system to the grid structure model to obtain the structural model of the AC power grid that resists phase-commutation failure.

[0076] In this embodiment, in response to a user's commutation failure structure upload operation, the terminal selects target structure information related to commutation failure from various AC power grid structure information and constructs a power grid structure model of the AC power grid based on the target structure information. The target structure information may include, but is not limited to, AC busbar structure information and structure information of individual electrical nodes in the AC power grid.

[0077] The terminal collects the configuration information of the commutation failure resistance system in the AC power grid and the connection method of the connection structure information of the commutation failure resistance system between the AC power grids, and based on the configuration information and the connection method of the connection structure information, adds the system parameters of the commutation failure resistance system to the power grid structure model to obtain the commutation failure resistance structure model of the AC power grid. Among them, the configuration information is the various configuration parameters of the commutation failure resistance system when the commutation failure resistance system is set in the AC power grid. Among them, the method of constructing the model and adding parameters is the method of constructing the model and adding conditional parameters through the modeling program corresponding to the finite element algorithm.

[0078] Based on the above scheme, structural modeling is performed by screening target structural information related to commutation failure, and system parameters of the commutation failure resistance system are added to the model, thereby obtaining a grid structure model of the AC power grid and a structural model of the AC power grid that resists commutation failure, thereby improving the accuracy of the constructed model.

[0079] Optionally, based on each voltage drop mode of the electrical node and each voltage drop depth of the electrical node, a simulation operating condition list of the electrical node is constructed, including: identifying the fault type corresponding to each voltage drop mode based on each voltage drop mode of the electrical node, and clustering each voltage drop mode according to the fault type of each voltage drop mode to obtain multiple drop mode groups; identifying the fault phase of each voltage drop mode in each drop mode group, and sorting each voltage drop mode in each drop mode group in order of fault phase from small to large to obtain a first voltage drop sequence of each drop mode group; sorting each voltage drop depth of the electrical node in order of voltage drop depth from small to large to obtain a second voltage drop sequence, and permuting and combining each first voltage drop sequence and the second voltage drop sequence to obtain a simulation operating condition list of the electrical node.

[0080] In this embodiment, the terminal identifies the fault type corresponding to each voltage drop mode based on the voltage drop mode of the electrical node, and clusters each voltage drop mode according to the fault type to obtain multiple drop mode groups. As shown in Table 1, which is a list of simulated operating conditions for the electrical node, each drop mode group includes a unidirectional group, a bidirectional group, a three-phase group, etc. The terminal then identifies the fault phase of each voltage drop mode in each drop mode group and sorts the voltage drop modes in each drop mode group in order of fault phase from small to large to obtain the first voltage drop sequence for each drop mode group. The fault phase of each voltage drop mode is the equidistant value of the voltage drop mode preset in the terminal by the staff. The terminal uses the difference as the fault phase offset degree difference of two adjacent voltage drop modes. As shown in Table 1, the first voltage drop sequence of the unidirectional group is in the order from top to bottom: unidirectional group: 18°, 36°, 54°, 72°, 90°, 108°, 126°, 144°, 162°, 180°. The terminal sorts the voltage drop depths of the electrical nodes in the order of voltage drop depth from small to large to obtain the second voltage drop sequence. As shown in Table 1, the horizontal axis of the table is 0.9, 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, 0.1, 0 from left to right. Finally, the terminal performs permutation and combination processing on each first voltage drop sequence and the second voltage drop sequence to obtain a list of simulation conditions for the electrical node. The list of simulation conditions is shown in Table 1:

[0081] Table 1: List of simulation conditions

[0082]

[0083]

[0084] Based on the above scheme, the comprehensiveness of the constructed simulation operating condition list is improved by arranging and combining the voltage drop depth and the voltage drop mode.

[0085] Optionally, based on the simulation working condition list, the operation process of the power grid structure model and the commutation failure resistance structure model are simulated respectively to obtain the first commutation record information of the power grid structure model and the second commutation record information of the commutation failure resistance structure model, including: collecting historical operation data information of the power grid structure model, and identifying the fault working condition information obtained by combining each voltage drop mode and each voltage drop depth in the simulation working condition list; inputting the historical operation data information and the simulation working condition list into the power grid structure model, simulating each fault working condition information respectively, obtaining the simulation result of the power grid structure model for each fault working condition information, and identifying the commutation result information corresponding to the simulation result; filling each commutation result information into the simulation working condition list according to the fault working condition information corresponding to the commutation result information, and obtaining the first commutation record information of the power grid structure model; using the commutation failure resistance structure model as the power grid structure model, and returning to execute the step of inputting the historical operation data information and the simulation working condition list into the power grid structure model, simulating each fault working condition information respectively, and obtaining the simulation result step of the power grid structure model for each fault working condition information, and obtaining the second commutation record information of the commutation failure resistance structure model.

[0086] In this embodiment, the terminal collects historical operating data from the power grid structure model and identifies fault conditions resulting from the combination of each voltage drop mode and each voltage drop depth in the simulation condition list. The terminal then inputs the historical operating data and the simulation condition list into the power grid structure model, simulates each fault condition, obtains the simulation results for each fault condition, and identifies the corresponding commutation result information. The commutation result information represents the commutation result when executing the fault condition, and includes information on commutation failure and non-failure.

[0087] The terminal then populates each commutation result information with the corresponding fault condition information into the simulation condition list, obtaining first commutation record information for the power grid structure model. The terminal then uses the commutation failure resistance structure model as the power grid structure model and returns to execute the step of inputting historical operating data and the simulation condition list into the power grid structure model, simulating each fault condition information separately, and obtaining the simulation results of the power grid structure model for each fault condition information, thereby obtaining second commutation record information for the commutation failure resistance structure model.

[0088] like Figure 2 As shown in FIG, the first commutation record information of the power grid structure model includes the commutation result information corresponding to different fault conditions. Figure 3 As shown, the second commutation record information of the commutation failure resistance structural model includes commutation result information corresponding to different fault conditions.

[0089] Optionally, the first commutation failure probability of the first commutation record information and the second commutation failure probability of the second commutation record information are calculated respectively, including: filtering out the commutation failure record information whose commutation result information is commutation failure in the commutation result information of the commutation record information corresponding to each fault operating condition information in the first commutation record information, and identifying the number of commutation failure record information; dividing the number of commutation failure record information by the number of all fault operating condition information to obtain the first commutation failure probability of the first commutation record information; taking the second commutation record information as the first commutation record information, and returning to execute the step of filtering out the commutation failure record information whose commutation result information is commutation failure in the commutation result information of the commutation record information corresponding to each fault operating condition information in the first commutation record information to obtain the second commutation failure probability of the second commutation record information.

[0090] In this embodiment, the terminal selects the commutation failure record information whose commutation result information is commutation failure from the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, and identifies the number of commutation failure record information; divides the number of commutation failure record information by the number of all fault condition information to obtain the first commutation failure probability of the first commutation record information. Figure 2 As shown, the first commutation failure probability of the first commutation record information is 282 / 300=94%.

[0091] The second commutation record information is used as the first commutation record information, and the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information is returned to perform, and the commutation failure record information step of the commutation result information is screened for commutation failure, to obtain the second commutation failure probability of the second commutation record information. Figure 3 As shown, the second commutation failure probability of the second commutation record information is 6 / 300=2%.

[0092] Based on the above scheme, the probability of commutation failure is determined by calculating the number of commutation failure records and dividing it by the number of all fault conditions. The commutation failure situation is quantified, which improves the accuracy of the identified commutation failure probability.

[0093] Optionally, based on the first commutation failure probability and the second commutation failure probability, identifying the commutation failure defense capability information of the commutation failure resistance system, including: inquiring in the historical power grid operation database, when there is no commutation failure resistance system, in the various fault working condition information of the simulation working condition list, there is a first target fault working condition with commutation result information, and using the commutation result information of the first target fault working condition as the first actual commutation information of each first target fault working condition; in the historical power grid operation database, inquiring when there is a commutation failure resistance system, in the various fault working condition information of the simulation working condition list, there is a second target fault working condition with commutation result information The present invention provides a method for determining a commutation failure probability of the first commutation record information based on the first actual commutation information of each first target fault condition, and using the commutation result information of the second target fault condition as the second actual commutation information of each second target fault condition; adjusting the first commutation failure probability of the first commutation record information based on the first actual commutation information of each first target fault condition to obtain a first target commutation failure probability; and adjusting the first commutation failure probability of the second commutation record information based on the second actual commutation information of each first target fault condition to obtain a second target commutation failure probability; and calculating commutation failure defense capability information of the commutation failure defense system through a defense capability algorithm based on the first target commutation failure probability and the second target commutation failure probability.

[0094] In this embodiment, the terminal searches the historical power grid operation database for first target fault conditions that include commutation result information in each fault condition list when the commutation failure mitigation system is not present, and uses the commutation result information for the first target fault condition as the first actual commutation information for each first target fault condition. The historical power grid operation database may not contain all fault condition information. Therefore, the terminal selects the commutation result information corresponding to the fault condition information when the commutation failure mitigation system is not present, as the first actual commutation information.

[0095] Then, the terminal searches the historical power grid operation database for the second target fault condition with commutation result information in each fault condition information of the simulation condition list when there is a commutation failure resistance system, and uses the commutation result information of the second target fault condition as the second actual commutation information of each second target fault condition.

[0096] Then, the terminal adjusts the first commutation failure probability of the first commutation record information based on the first actual commutation information of each first target fault condition to obtain the first target commutation failure probability, and adjusts the first commutation failure probability of the second commutation record information based on the second actual commutation information of each first target fault condition to obtain the second target commutation failure probability.

[0097] Finally, based on the first target commutation failure probability and the second target commutation failure probability, the terminal calculates the first target commutation failure probability minus the second target commutation failure probability through the defense capability algorithm. After obtaining the difference probability, the terminal calculates the ratio between the difference probability and the first target commutation failure probability to obtain the commutation failure defense capability information of the commutation failure defense system. Figure 2 、 3 As shown, when the adjusted first target commutation failure probability is 94% and the second target commutation failure probability is 2%, the commutation failure defense capability information calculated by the terminal for the commutation failure defense system is (94-2) / 94=97.87%. That is, the commutation failure defense capability information of the commutation failure defense system is 97.87%.

[0098] Based on the above scheme, the simulated commutation information is adjusted by the actual commutation information, thereby improving the practicality and accuracy of the commutation failure defense capability information of the identified commutation failure defense system.

[0099] This application also provides an example of determining commutation failure defense capability information, such as Figure 4 As shown, the specific processing process includes the following steps:

[0100] Step S401 : obtaining voltage drop modes and voltage drop depths of electrical nodes of the AC power grid, structural data information of structural information of the AC power grid, and system parameters of the commutation failure protection system.

[0101] Step S402 : In response to the user's commutation failure structure upload operation, target structure information related to commutation failure is screened from various structure information of the AC power grid, and a grid structure model of the AC power grid is constructed based on the target structure information.

[0102] Step S403, collecting the configuration information of the commutation failure resistance system in the AC power grid and the connection method of the connection structure information of the commutation failure resistance system between the AC power grids, and based on the configuration information and the connection method of the connection structure information, adding the system parameters of the commutation failure resistance system to the power grid structure model to obtain the commutation failure resistance structure model of the AC power grid.

[0103] Step S404 : Based on the voltage drop modes of the electrical nodes, the fault type corresponding to each voltage drop mode is identified, and the voltage drop modes are clustered according to the fault type to obtain a plurality of drop mode groups.

[0104] Step S405 , identifying the fault phase of each voltage sag mode in each sag mode group, and sorting each voltage sag mode in each sag mode group in ascending order of fault phase to obtain a first voltage sag sequence for each sag mode group.

[0105] Step S406 , sorting the voltage drop depths of the electrical nodes in ascending order to obtain a second voltage drop sequence, and performing permutation and combination processing on the first voltage drop sequences and the second voltage drop sequences to obtain a simulation operating condition list of the electrical nodes.

[0106] Step S407 , collecting historical operating data information of the power grid structure model, and identifying fault operating condition information obtained by combining each voltage drop mode and each voltage drop depth in the simulation operating condition list.

[0107] Step S408: input the historical operation data information and the simulation condition list into the power grid structure model, simulate each fault condition information respectively, obtain the simulation result of the power grid structure model for each fault condition information, and identify the commutation result information corresponding to the simulation result.

[0108] Step S409 : Fill each commutation result information into the simulation condition list according to the fault condition information corresponding to the commutation result information, and obtain the first commutation record information of the power grid structure model.

[0109] In step S410, the commutation failure resistance structural model is used as the power grid structure model, and the historical operation data information and the simulation condition list are input into the power grid structure model, each fault condition information is simulated respectively, and the simulation result step of the power grid structure model for each fault condition information is obtained, thereby obtaining the second commutation record information of the commutation failure resistance structural model.

[0110] Step S411 , filtering commutation failure record information whose commutation result information is commutation failure from the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, and identifying the number of commutation failure record information.

[0111] Step S412: Divide the number of commutation failure record information by the number of all fault condition information to obtain a first commutation failure probability of the first commutation record information.

[0112] Step S413: Use the second commutation record information as the first commutation record information, and return to the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, and filter the commutation failure record information whose commutation result information is a commutation failure, to obtain a second commutation failure probability of the second commutation record information.

[0113] In step S414, in the historical power grid operation database, in the absence of the commutation failure protection system, the first target fault condition with commutation result information is searched in the fault condition information of the simulation condition list, and the commutation result information of the first target fault condition is used as the first actual commutation information of each first target fault condition.

[0114] Step S415, in the historical power grid operation database, query the fault condition information of the simulation condition list when there is a commutation failure protection system, and find the second target fault condition with commutation result information, and use the commutation result information of the second target fault condition as the second actual commutation information of each second target fault condition.

[0115] Step S416: Based on the first actual commutation information of each first target fault condition, the first commutation failure probability of the first commutation record information is adjusted to obtain a first target commutation failure probability. Based on the second actual commutation information of each first target fault condition, the first commutation failure probability of the second commutation record information is adjusted to obtain a second target commutation failure probability.

[0116] Step S417 , calculating commutation failure defense capability information of the commutation failure defense system based on the first target commutation failure probability and the second target commutation failure probability through a defense capability algorithm.

[0117] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0118] Based on the same inventive concept, embodiments of the present application further provide a device for determining commutation failure defense capability information, which is used to implement the aforementioned method for determining commutation failure defense capability information. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more embodiments of the device for determining commutation failure defense capability information provided below can be found in the aforementioned method for determining commutation failure defense capability information, and will not be further elaborated here.

[0119] In one embodiment, Figure 5 As shown, a device for determining commutation failure defense capability information is provided, including: an acquisition module 510, a simulation module 520 and an identification module 530, wherein:

[0120] An acquisition module 510 is configured to acquire voltage drop modes of electrical nodes of an AC power grid, voltage drop depths of the electrical nodes, structural data information of structural information of the AC power grid, and system parameters of a commutation failure resistance system, and construct a grid structure model of the AC power grid and a commutation failure resistance structural model of the AC power grid based on the structural information of the AC power grid and the system parameters of the commutation failure resistance system.

[0121] a simulation module 520 configured to construct a simulation operating condition list for the electrical node based on the voltage drop modes and voltage drop depths of the electrical node, and to simulate the operation of the power grid structure model and the commutation failure resistance structure model based on the simulation operating condition list, respectively, to obtain first commutation record information of the power grid structure model and second commutation record information of the commutation failure resistance structure model;

[0122] The identification module 530 is configured to respectively calculate a first commutation failure probability of the first commutation record information and a second commutation failure probability of the second commutation record information, and identify commutation failure defense capability information of the commutation failure defense system based on the first commutation failure probability and the second commutation failure probability.

[0123] Optionally, the acquisition module 510 is specifically configured to:

[0124] In response to a user's commutation failure structure upload operation, target structure information related to the commutation failure is selected from various structural information of the AC power grid, and a grid structure model of the AC power grid is constructed based on the target structure information;

[0125] The configuration information of the commutation failure resistance system in the AC power grid and the connection mode of the connection structure information of the commutation failure resistance system between the AC power grids are collected, and based on the configuration information and the connection mode of the connection structure information, the system parameters of the commutation failure resistance system are added to the power grid structure model to obtain the commutation failure resistance structure model of the AC power grid.

[0126] Optionally, the simulation module 520 is specifically configured to:

[0127] Based on the voltage drop modes of the electrical nodes, identifying the fault type corresponding to each voltage drop mode, and clustering the voltage drop modes according to the fault type to obtain a plurality of drop mode groups;

[0128] Identifying the fault phase of each voltage sag mode in each sag mode group, and sorting the voltage sag modes in each sag mode group in ascending order of the fault phase to obtain a first voltage sag sequence for each sag mode group;

[0129] The voltage drop depths of the electrical nodes are sorted in ascending order to obtain a second voltage drop sequence, and the first voltage drop sequences and the second voltage drop sequences are permuted and combined to obtain a simulation operating condition list of the electrical nodes.

[0130] Optionally, the simulation module 520 is specifically configured to:

[0131] Collecting historical operating data information of the power grid structure model, and identifying fault operating condition information obtained by combining each voltage drop mode and each voltage drop depth in the simulation operating condition list;

[0132] Inputting the historical operating data information and the simulation operating condition list into the power grid structure model, simulating each fault operating condition information respectively, obtaining simulation results of the power grid structure model for each fault operating condition information, and identifying commutation result information corresponding to the simulation results;

[0133] Fill each commutation result information into the simulation condition list according to the fault condition information corresponding to the commutation result information, to obtain the first commutation record information of the power grid structure model;

[0134] The commutation failure resistance structural model is used as the power grid structure model, and the historical operation data information and the simulation operating condition list are input into the power grid structure model, each fault operating condition information is simulated respectively, and the simulation result step of the power grid structure model for each fault operating condition information is obtained to obtain the second commutation record information of the commutation failure resistance structural model.

[0135] Optionally, the identification module 530 is specifically configured to:

[0136] Filtering the commutation failure record information whose commutation result information is commutation failure from the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, and identifying the number of the commutation failure record information;

[0137] Dividing the number of the commutation failure record information by the number of all fault condition information to obtain a first commutation failure probability of the first commutation record information;

[0138] The second commutation record information is used as the first commutation record information, and the step of filtering commutation failure record information whose commutation result information indicates commutation failure is performed again in the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, thereby obtaining a second commutation failure probability of the second commutation record information.

[0139] Optionally, the identification module 530 is specifically configured to:

[0140] In a historical power grid operation database, searching for a first target fault condition including commutation result information in each fault condition information of the simulation condition list when there is no commutation failure protection system, and using the commutation result information of the first target fault condition as first actual commutation information of each first target fault condition;

[0141] In the historical power grid operation database, when a commutation failure mitigation system is present, searching for a second target fault condition including commutation result information in each fault condition information of the simulation condition list, and using the commutation result information of the second target fault condition as the second actual commutation information of each second target fault condition;

[0142] Based on the first actual commutation information of each of the first target fault conditions, adjusting the first commutation failure probability of the first commutation record information to obtain a first target commutation failure probability; and based on the second actual commutation information of each of the first target fault conditions, adjusting the first commutation failure probability of the second commutation record information to obtain a second target commutation failure probability;

[0143] Based on the first target commutation failure probability and the second target commutation failure probability, commutation failure defense capability information of the commutation failure defense system is calculated using a defense capability algorithm.

[0144] Each module in the aforementioned apparatus for determining commutation failure defense capability information may be implemented in whole or in part via software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor within a computer device in the form of hardware, or may be stored in a memory within the computer device in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0145] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 6As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner. The wireless manner can be achieved through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for determining commutation failure defense capability information is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer covering the display screen, or a key, trackball or touchpad provided on the computer device housing, or an external keyboard, touchpad or mouse.

[0146] Those skilled in the art will understand that Figure 6 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0147] In one embodiment, a computer device is provided, comprising a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the steps of any one of the methods in the first aspect are implemented.

[0148] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the methods in the first aspect are implemented.

[0149] In one embodiment, a computer program product is provided, comprising a computer program, which implements the steps of any one of the methods of the first aspect when executed by a processor.

[0150] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0151] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0152] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0153] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for determining commutation failure defense capability information, characterized in that: The method comprises: Acquiring various voltage drop modes of electrical nodes of an AC power grid, voltage drop depths of the electrical nodes, structural data information of various structural information of the AC power grid, and system parameters of a commutation failure resistance system, and constructing a grid structure model of the AC power grid and a commutation failure resistance structural model of the AC power grid based on the various structural information of the AC power grid and the system parameters of the commutation failure resistance system; Constructing a simulation operating condition list for the electrical node based on each voltage drop mode and each voltage drop depth of the electrical node, and simulating the operation process of the power grid structure model and the commutation failure resistance structure model based on the simulation operating condition list to obtain first commutation record information of the power grid structure model and second commutation record information of the commutation failure resistance structure model; A first commutation failure probability of the first commutation record information and a second commutation failure probability of the second commutation record information are respectively calculated, and commutation failure defense capability information of the commutation failure defense system is identified based on the first commutation failure probability and the second commutation failure probability.

2. The method according to claim 1, characterized in that The step of constructing a grid structure model of the AC grid and a commutation failure resistance structure model of the AC grid based on the structural information of the AC grid and the system parameters of the commutation failure resistance system includes: In response to a user's commutation failure structure upload operation, target structure information related to the commutation failure is selected from various structural information of the AC power grid, and a grid structure model of the AC power grid is constructed based on the target structure information; The configuration information of the commutation failure resistance system in the AC power grid and the connection mode of the connection structure information of the commutation failure resistance system between the AC power grids are collected, and based on the configuration information and the connection mode of the connection structure information, the system parameters of the commutation failure resistance system are added to the power grid structure model to obtain the commutation failure resistance structure model of the AC power grid.

3. The method according to claim 1, characterized in that The constructing of a simulation operating condition list of the electrical node based on each voltage drop mode and each voltage drop depth of the electrical node includes: Based on the voltage drop modes of the electrical nodes, identifying the fault type corresponding to each voltage drop mode, and clustering the voltage drop modes according to the fault type to obtain a plurality of drop mode groups; Identifying the fault phase of each voltage sag mode in each sag mode group, and sorting the voltage sag modes in each sag mode group in ascending order of the fault phase to obtain a first voltage sag sequence for each sag mode group; The voltage drop depths of the electrical nodes are sorted in ascending order to obtain a second voltage drop sequence, and the first voltage drop sequences and the second voltage drop sequences are permuted and combined to obtain a simulation operating condition list of the electrical nodes.

4. The method according to claim 3, characterized in that The step of simulating the operation process of the power grid structure model and the commutation failure resistance structure model based on the simulation operating condition list to obtain first commutation record information of the power grid structure model and second commutation record information of the commutation failure resistance structure model includes: Collecting historical operating data information of the power grid structure model, and identifying fault operating condition information obtained by combining each voltage drop mode and each voltage drop depth in the simulation operating condition list; Inputting the historical operating data information and the simulation operating condition list into the power grid structure model, simulating each fault operating condition information respectively, obtaining simulation results of the power grid structure model for each fault operating condition information, and identifying commutation result information corresponding to the simulation results; Fill each commutation result information into the simulation condition list according to the fault condition information corresponding to the commutation result information, to obtain the first commutation record information of the power grid structure model; The commutation failure resistance structural model is used as the power grid structure model, and the historical operation data information and the simulation operating condition list are input into the power grid structure model, each fault operating condition information is simulated respectively, and the simulation result step of the power grid structure model for each fault operating condition information is obtained to obtain the second commutation record information of the commutation failure resistance structural model.

5. The method according to claim 4, characterized in that The respectively calculating a first commutation failure probability of the first commutation record information and a second commutation failure probability of the second commutation record information includes: Filtering the commutation failure record information whose commutation result information is commutation failure from the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, and identifying the number of the commutation failure record information; Dividing the number of the commutation failure record information by the number of all fault condition information to obtain a first commutation failure probability of the first commutation record information; The second commutation record information is used as the first commutation record information, and the step of filtering commutation failure record information whose commutation result information indicates commutation failure is performed again in the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, thereby obtaining a second commutation failure probability of the second commutation record information.

6. The method according to claim 4, characterized in that The identifying, based on the first commutation failure probability and the second commutation failure probability, commutation failure defense capability information of the commutation failure defense system includes: In a historical power grid operation database, searching for a first target fault condition including commutation result information in each fault condition information of the simulation condition list when there is no commutation failure protection system, and using the commutation result information of the first target fault condition as first actual commutation information of each first target fault condition; In the historical power grid operation database, when a commutation failure mitigation system is present, searching for a second target fault condition including commutation result information in each fault condition information of the simulation condition list, and using the commutation result information of the second target fault condition as the second actual commutation information of each second target fault condition; Based on the first actual commutation information of each of the first target fault conditions, adjusting the first commutation failure probability of the first commutation record information to obtain a first target commutation failure probability; and based on the second actual commutation information of each of the first target fault conditions, adjusting the first commutation failure probability of the second commutation record information to obtain a second target commutation failure probability; Based on the first target commutation failure probability and the second target commutation failure probability, commutation failure defense capability information of the commutation failure defense system is calculated using a defense capability algorithm.

7. A device for determining commutation failure defense capability information, characterized in that: The device comprises: an acquisition module, configured to acquire voltage drop modes of electrical nodes of an AC power grid, voltage drop depths of the electrical nodes, structural data information of structural information of the AC power grid, and system parameters of a commutation failure resistance system, and construct a power grid structure model of the AC power grid and a commutation failure resistance structure model of the AC power grid based on the structural information of the AC power grid and the system parameters of the commutation failure resistance system; a simulation module configured to construct a simulation operating condition list for the electrical node based on each voltage drop mode and each voltage drop depth of the electrical node, and simulate the operation process of the power grid structure model and the commutation failure resistance structure model based on the simulation operating condition list, respectively, to obtain first commutation record information of the power grid structure model and second commutation record information of the commutation failure resistance structure model; an identification module, configured to respectively calculate a first commutation failure probability of the first commutation record information and a second commutation failure probability of the second commutation record information, and identify commutation failure defense capability information of the commutation failure defense system based on the first commutation failure probability and the second commutation failure probability.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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