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

Abstract

The invention relates to a method and device for determining commutation failure defense capability information and computer equipment. The method comprises the following steps: acquiring voltage drop modes and voltage drop depths of electrical nodes of an AC power grid, structural data information of structural information of the AC power grid, and system parameters of a commutation failure resisting system, and constructing a power grid structural model of the AC power grid and a commutation failure resisting structural model of the AC power grid; based on each voltage drop mode and each voltage drop depth of the electrical node, constructing a simulation working condition list of the electrical node; and simulating to obtain a first commutation failure probability of the first commutation record information of the power grid structure model and a second commutation failure probability of the second commutation record information of the commutation failure resisting structure model, thereby identifying commutation failure defense capability information of the commutation failure resisting system. By adopting the method, the accuracy of evaluating the commutation failure resistance information of the commutation failure defense system can be improved.

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 of HVDC transmission technology and one of the most common faults in the operation of HVDC transmission projects. When commutation failure occurs, the AC and DC voltages of the converter station are low, the current is overcurrent, and the DC power transmitted decreases, causing large-scale power fluctuations in both the sending and receiving power grids, affecting the safe operation of the power grid. In order to solve the problem of commutation failure, technical solutions such as power control based on commutation failure prediction, new commutation topology based on IGBT (Insulated Gate Bipolar Transistor) auxiliary valve, and new commutation valve based on IGCT (Igct, integrated Gate Commutated Thyristors) devices have been proposed. However, since it is impossible to directly detect the probability of commutation failure, it is impossible to identify the effectiveness of the technical solution in resisting commutation failure. Therefore, how to detect the probability of commutation failure is the current research focus.

[0003] The current method of detecting the probability of commutation failure is to use the voltage drop of the receiving AC power grid as the basis for predicting commutation failure. That is, once the voltage of the AC power grid where the inverter station is located drops, it is considered that there is a possibility of commutation failure in the system, and then judge whether the system has commutation failure. However, commutation failure may still occur when the AC voltage is distorted but the effective value does not drop significantly. Therefore, simply identifying whether the system has commutation failure by detecting voltage drops has great limitations, resulting in low accuracy of information on the ability of the commutation failure defense system to resist commutation failure. 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 in response to the above technical problems.

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

[0006] Acquire various voltage drop modes of electrical nodes of the AC power grid, various 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 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 various structural information of the AC power grid and the system parameters of the commutation failure resistance system;

[0007] 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, and 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;

[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 calculated respectively, and based on the first commutation failure probability and the second commutation failure probability, commutation failure defense capability information of the commutation failure defense system is identified.

[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 commutation failure structure upload operation by a user, target structure information related to the commutation failure is selected from various structure information of the AC power grid, and a power 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 of the electrical node 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 of each voltage drop mode to obtain a plurality of drop mode groups;

[0014] Identify the fault phase of each voltage drop mode in each drop mode group, and sort the voltage drop modes in each drop mode group in order of the fault phase from small to large, to obtain a first voltage drop sequence of each drop 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 arranged and combined to obtain a simulation operating condition list of the electrical nodes.

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

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

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

[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 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 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] In the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, filter the commutation failure record information whose commutation result information is commutation failure, and identify the number of 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 commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information is returned to execute, and the commutation failure record information step of the commutation result information is screened out as the commutation failure, to obtain the 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 the historical power grid operation database, when there is no commutation failure protection system, in each of the fault operating condition information in the simulation operating condition list, it is searched whether there is a first target fault operating condition with commutation result information, and the commutation result information of the first target fault operating condition is used as the first actual commutation information of each of the first target fault operating conditions;

[0027] In the historical power grid operation database, when there is a commutation failure protection system, in each of the fault condition information in the simulation condition list, it is searched whether there is a second target fault condition with commutation result information, and the commutation result information of the second target fault condition is used as the second actual commutation information of each of the second target fault conditions;

[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 through a defense capability algorithm.

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

[0031] An acquisition module, used for acquiring various voltage drop modes of electrical nodes of an AC power grid, various 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 power grid structure model of the AC power grid and a commutation failure resistance structure 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;

[0032] A simulation module, for 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, 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, 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 used to:

[0035] In response to a commutation failure structure upload operation by a user, target structure information related to the commutation failure is selected from various structure information of the AC power grid, and a power 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 for:

[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 of each voltage drop mode to obtain a plurality of drop mode groups;

[0039] Identify the fault phase of each voltage drop mode in each drop mode group, and sort the voltage drop modes in each drop mode group in order of the fault phase from small to large, to obtain a first voltage drop sequence of each drop 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 arranged and combined to obtain a simulation operating condition list of the electrical nodes.

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

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

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

[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 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 to obtain the second commutation record information of the commutation failure resistance structural model.

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

[0047] In the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, filter the commutation failure record information whose commutation result information is commutation failure, and identify the number of 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 commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information is returned to execute, and the commutation failure record information step of the commutation result information is screened out as the commutation failure, to obtain the second commutation failure probability of the second commutation record information.

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

[0051] In the historical power grid operation database, when there is no commutation failure protection system, in each of the fault operating condition information in the simulation operating condition list, it is searched whether there is a first target fault operating condition with commutation result information, and the commutation result information of the first target fault operating condition is used as the first actual commutation information of each of the first target fault operating conditions;

[0052] In the historical power grid operation database, when there is a commutation failure protection system, in each of the fault condition information in the simulation condition list, it is searched whether there is a second target fault condition with commutation result information, and the commutation result information of the second target fault condition is used as the second actual commutation information of each of the second target fault conditions;

[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 through a defense capability algorithm.

[0055] In a third aspect, the present application provides a computer device, wherein the computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of any one of the methods in the first aspect are implemented.

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

[0057] In a fifth aspect, the present application provides a computer program product. The computer program product includes 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 the phase-change failure defense capability information obtain the voltage drop modes of the electrical nodes of the AC power grid, the voltage drop depths of the electrical nodes, the structural data information of the structural information of the AC power grid, and the system parameters of the phase-change failure defense system, and construct the power grid structure model of the AC power grid and the phase-change failure defense structure model of the AC power grid based on the structural information of the AC power grid and the system parameters of the phase-change failure defense system; construct a simulation operating condition list of the electrical nodes based on the voltage drop modes of the electrical nodes and the voltage drop depths of the electrical nodes, and simulate the operation process of the power grid structure model and the phase-change failure defense structure model based on the simulation operating condition list, respectively, to obtain the first phase-change record information of the power grid structure model and the second phase-change record information of the phase-change failure defense structure model; calculate the first phase-change failure probability of the first phase-change record information and the second phase-change failure probability of the second phase-change record information, and identify the phase-change failure defense capability information of the phase-change failure defense system based on the first phase-change failure probability and the second phase-change failure probability. By constructing a power grid structure model and a commutation failure resistance structure model, the operation of electrical nodes in various voltage drop modes and voltage drop depths is simulated 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. Then, by calculating the commutation failure probability of each commutation record information respectively, the commutation failure defense capability information of the commutation failure resistance system is identified. Not only the accuracy of detecting the commutation failure probability is improved through intelligent simulation, but also the commutation record information of the electrical nodes that are the main causes of the commutation failure is simulated in different voltage drop modes and different voltage drop depths, so as to analyze the commutation failure defense capability information of the commutation failure resistance system, 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. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0060] Figure 2 is a schematic diagram of first phase change recording information in one embodiment;

[0061] Figure 3 is a schematic diagram of first phase change recording information in one embodiment;

[0062] Figure 4 A schematic diagram of a flow chart of 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 an embodiment;

[0064] Figure 6 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present 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. Among them, the method can be applied to the terminal, and can also be applied to the server, and can also be applied to the system including the terminal and the server, and is implemented through the interaction between the terminal and the server. Among them, the terminal can be, but is not limited to, various personal computers, laptops, smart phones, tablet computers, etc. The server can be implemented with an independent server or a server cluster composed of multiple servers. Among them, the terminal constructs a power grid structure model and a commutation failure resistance structure model to simulate the operation of the electrical node in each voltage drop mode and each voltage drop depth, and obtains 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 respectively, the commutation failure defense capability information of the commutation failure resistance system is identified. Not only the accuracy of detecting the commutation failure probability is improved through intelligent simulation, but also the commutation record information of the electrical nodes that are the main causes of the commutation failure is simulated in different voltage drop modes and different voltage drop depths, thereby analyzing the commutation failure defense capability information of the commutation failure resistance system. The pertinence and comprehensiveness of the analysis of the commutation failure defense capability information are improved, thereby comprehensively improving the accuracy of evaluating the commutation failure defense system's resistance to commutation failure information.

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

[0068] Step S101, obtaining various voltage drop modes of electrical nodes of the AC power grid, various voltage drop depths of electrical nodes, structural data information of various structural information of the AC power grid, and system parameters of the commutation failure resistance system, and constructing 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 various structural information of the AC power grid and the system parameters of the commutation failure resistance system.

[0069] In this embodiment, the terminal responds to the user's electrical node information upload operation to obtain the voltage drop mode of each electrical node of the AC power grid, the voltage drop depth of each electrical node, the structural data information of each structural information of the AC power grid, and the system parameters of the commutation failure resistance system. Among them, the voltage drop mode includes the voltage drop mode corresponding to a single-phase grounding fault, the voltage drop mode corresponding to a two-phase grounding fault, the voltage drop mode corresponding to a two-phase phase-to-phase short circuit fault, and the voltage drop mode corresponding to a three-phase short circuit fault. The voltage drop depth includes the AC voltage dropping to 90% to 10% of the normal rated voltage, and a drop depth is set for each 10% drop in the voltage within this range. The structural data information of each structural information of the AC power grid includes the structural data information of the AC busbar of the inverter station of the DC transmission of the AC power grid, and the structural data information of each electrical node of the AC power grid where the inverter station is located. The commutation failure resistance system is a system structure set in the AC power grid for controlling the AC power grid to 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 phase commutation law. Then, based on the 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, construct a simulation operating condition list of the electrical nodes, and based on the simulation operating condition list, simulate the operation process of the power grid structure model and the commutation failure resistance structure model 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 simulation condition list of the electrical nodes. The simulation condition list includes the fault condition information of the electrical nodes that are arranged and combined with the voltage drop modes and voltage drop depths. The terminal simulates the operation process of each fault condition information through the operation process of the power grid structure model and the structure model for resisting commutation failure, thereby detecting the first commutation record information of the power grid structure model and the second commutation record information of the structure model for resisting commutation failure. 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 operation of the electrical nodes in various voltage drop modes and voltage drop depths is simulated 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. Then, by calculating the commutation failure probability of each commutation record information respectively, the commutation failure defense capability information of the commutation failure resistance system is identified, which not only improves the accuracy of detecting the commutation failure probability through intelligent simulation, but also analyzes the commutation failure defense capability information of the commutation failure resistance system by simulating the commutation record information of the electrical nodes that are the main causes of the commutation failure in different voltage drop modes and different voltage drop depths, thereby improving 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.

[0075] Optionally, based on various structural information of the AC power grid and 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 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 configuration information of the phase commutation failure resistance system in the AC power grid and connection mode of connection structural information of the phase commutation failure resistance system between AC power grids, and based on the configuration information and the connection mode of the connection structural 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 the user's commutation failure structure upload operation, the terminal selects target structure information related to commutation failure from various structure information of the AC power grid, and constructs a power grid structure model of the AC power grid based on the target structure information. The target structure information may be, but is not limited to, AC bus structure information in the AC power grid and structure information of a single electrical node.

[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 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 building the model and adding parameters is the method of building 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 the target structural information related to commutation failure, and the system parameters of the commutation failure resistance system are added to the model, so as to obtain the grid structure model of the AC power grid and the structural model of the AC power grid to resist commutation failure, thereby improving the accuracy of model construction.

[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: based on each voltage drop mode of the electrical node, identifying the fault type corresponding to each voltage drop mode, 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 each voltage drop mode of the electrical node, and clusters each voltage drop mode according to the fault type of each voltage drop mode to obtain multiple drop mode groups, as shown in Table 1, which is a list of simulation conditions of the electrical node, wherein each drop mode group includes a unidirectional group, a bidirectional group, a three-phase group, etc. Then, the terminal identifies the fault phase of each voltage drop mode in each drop mode group, and sorts each voltage drop mode in each drop mode group in order from small to large in fault phase, to obtain the first voltage drop sequence of each drop mode group. Among them, 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, which is the horizontal axis of the table, the order of the voltage drop sequence from left to right is 0.9, 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, 0.1, 0. Finally, the terminal arranges and combines the first voltage drop sequences and the second voltage drop sequences to obtain a list of simulation conditions for the electrical nodes. 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 condition list is improved by arranging and combining the voltage drop depth and the voltage drop mode.

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

[0086] In this embodiment, the terminal collects historical operation data information of the power grid structure model, and identifies the fault condition information obtained by combining each voltage drop mode and each voltage drop depth in the simulation condition list. Then, the terminal inputs the historical operation data information and the simulation condition list into the power grid structure model, simulates each fault condition information respectively, obtains the simulation result of the power grid structure model for each fault condition information, and identifies the commutation result information corresponding to the simulation result. Among them, the commutation result information is the commutation result when executing the fault condition information, and the commutation result information includes commutation failure and non-failure.

[0087] Then, the terminal fills each commutation result information into the simulation condition list according to the fault condition information corresponding to the commutation result information, and obtains the first commutation record information of the power grid structure model. After that, the terminal uses the commutation failure resistance structure model as the power grid structure model, and returns to execute the historical operation data information and the simulation condition list, inputs the power grid structure model, simulates each fault condition information respectively, obtains the simulation result step of the power grid structure model for each fault condition information, and obtains the second commutation record information of the commutation failure resistance structure model.

[0088] like Figure 2 As shown in FIG. 1 , the first commutation record information of the power grid structure model includes commutation result information corresponding to different fault conditions. Figure 3 As shown, the second commutation record information of the commutation failure resistance structure model includes commutation result information corresponding to different fault condition information.

[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: in the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, screening the commutation failure record information whose commutation result information is commutation failure, and identifying the number of commutation failure record information; dividing 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; taking the second commutation record information as the first commutation record information, and returning to execute the step of screening 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 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, and the second commutation failure probability of the second commutation record information is obtained. 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 record information and dividing it by the number of all fault condition information. The commutation failure situation is digitized, thereby improving 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: in the historical power grid operation database, querying the first target fault condition with commutation result information in each fault condition information in the simulation condition list when there is no commutation failure resistance system, and using the commutation result information of the first target fault condition as the first actual commutation information of each first target fault condition; in the historical power grid operation database, querying the second target fault condition with commutation result information in each fault condition information in the simulation condition list when there is a commutation failure resistance system a first target fault condition, and uses 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 first target fault condition, the first commutation failure probability of the first commutation record information is adjusted to obtain the first target commutation failure probability; and 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 the second target commutation failure probability; based on the first target commutation failure probability and the second target commutation failure probability, the commutation failure defense capability information of the commutation failure defense system is calculated through a defense capability algorithm.

[0094] In this embodiment, the terminal searches the historical power grid operation database for the first target fault condition with commutation result information in each fault condition information of the simulation condition list when there is no commutation failure resistance system, and uses the commutation result information of the first target fault condition as the first actual commutation information of each first target fault condition. The historical power grid operation database may not contain all fault condition information, so the terminal screens the commutation result information corresponding to the fault condition information contained in the historical power grid operation database and when there is no commutation failure resistance system in the historical power grid operation database 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 protection 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, and after obtaining the difference probability, calculates the ratio between the difference probability and the first target commutation failure, and obtains 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 of the commutation failure defense system calculated by the terminal is (94-2) / 94=97.87%. That is, the commutation failure defense capability information of the commutation failure defense system is 97.87% for commutation failure defense capability.

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

[0100] Step S401, obtaining each voltage drop mode of the electrical nodes of the AC power grid, each voltage drop depth of the electrical nodes, structural data information of each 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, collect 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, add 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, identifying the fault type corresponding to each voltage drop mode, and clustering the voltage drop modes according to the fault type of each voltage drop mode 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 the fault phase, to obtain a first voltage sag sequence of 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 operation data information of the power grid structure model, and identifying fault condition information obtained by combining each voltage drop mode and each voltage drop depth in the simulation condition list.

[0107] Step S408, inputting historical operation data information and simulation condition list into the power grid structure model, simulating each fault condition information respectively, obtaining the simulation result of the power grid structure model for each fault condition information, and identifying 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] Step S410, using the commutation failure resistance structural model as the power grid structure model, and returning to execute the historical operation data information and the simulation condition list, inputting the power grid structure model, simulating each fault condition information respectively, obtaining the simulation result step of the power grid structure model for each fault condition information, and obtaining the second commutation record information of the commutation failure resistance structural model.

[0110] Step S411, filtering out 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, taking the second commutation record information as the first commutation record information, and returning to execute the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, screening the commutation failure record information step of the commutation result information as commutation failure, and obtaining the second commutation failure probability of the second commutation record information.

[0113] Step S414, in the historical power grid operation database, query the first target fault condition with commutation result information in each fault condition information of the simulation condition list when there is no commutation failure protection system, and use the commutation result information of the first target fault condition as the first actual commutation information of each first target fault condition.

[0114] Step S415, in the historical power grid operation database, query 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 protection system, 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 the first target commutation failure probability; and 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 the second target commutation failure probability.

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

[0117] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed 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 part of the steps or stages in other steps.

[0118] Based on the same inventive concept, the embodiment of the present application also provides a device for determining commutation failure defense capability information for implementing the method for determining commutation failure defense capability information involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the embodiments of one or more devices for determining commutation failure defense capability information provided below can refer to the limitations of the method for determining commutation failure defense capability information above, and will not be repeated here.

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

[0120] An acquisition module 510 is used to acquire various voltage drop modes of electrical nodes of an AC power grid, various 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 to 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 various structural information of the AC power grid and the system parameters of the commutation failure resistance system;

[0121] A simulation module 520 is used to construct 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 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 the first commutation record information of the power grid structure model and the second commutation record information of the commutation failure resistance structure model;

[0122] The identification module 530 is used to respectively calculate the first commutation failure probability of the first commutation record information and the second commutation failure probability of the second commutation record information, and identify the commutation failure defense capability information of the commutation failure resistance 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 commutation failure structure upload operation by a user, target structure information related to the commutation failure is selected from various structure information of the AC power grid, and a power 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 used for:

[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 of each voltage drop mode to obtain a plurality of drop mode groups;

[0128] Identify the fault phase of each voltage drop mode in each drop mode group, and sort the voltage drop modes in each drop mode group in order of the fault phase from small to large, to obtain a first voltage drop sequence of each drop 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 arranged and combined to obtain a simulation operating condition list of the electrical nodes.

[0130] Optionally, the simulation module 520 is specifically used for:

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

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

[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 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 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] In the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, filter the commutation failure record information whose commutation result information is commutation failure, and identify the number of 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 commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information is returned to execute, and the commutation failure record information step of the commutation result information is screened out as the commutation failure, to obtain the second commutation failure probability of the second commutation record information.

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

[0140] In the historical power grid operation database, when there is no commutation failure protection system, in each of the fault operating condition information in the simulation operating condition list, it is searched whether there is a first target fault operating condition with commutation result information, and the commutation result information of the first target fault operating condition is used as the first actual commutation information of each of the first target fault operating conditions;

[0141] In the historical power grid operation database, when there is a commutation failure protection system, in each of the fault condition information in the simulation condition list, it is searched whether there is a second target fault condition with commutation result information, and the commutation result information of the second target fault condition is used as the second actual commutation information of each of the second target fault conditions;

[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 through a defense capability algorithm.

[0144] Each module in the above-mentioned commutation failure defense capability determination device can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each of the above modules.

[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 through a system bus. Among them, 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, and 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 the phase switching 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, and the input device of the computer device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[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 those shown in the figure, or combine certain components, or have a different arrangement of components.

[0147] In one embodiment, a computer device is provided, including 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, when executed by a processor, implements the steps of any one of the methods in the first aspect.

[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 can understand that all or part of the processes in the above-mentioned embodiment methods can be completed 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 the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an 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 each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0152] The technical features of the above embodiments may 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 only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for determining commutation failure defense capability information, characterized in that: The method comprises: Acquire various voltage drop modes of electrical nodes of the AC power grid, various 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 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 various structural information of the AC power grid and the system parameters of the commutation failure resistance system; 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, and 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; A first commutation failure probability of the first commutation record information and a second commutation failure probability of the second commutation record information are calculated respectively, and based on the first commutation failure probability and the second commutation failure probability, commutation failure defense capability information of the commutation failure defense system is identified.

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 commutation failure structure upload operation by a user, target structure information related to the commutation failure is selected from various structure information of the AC power grid, and a power 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 of the electrical node 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 of each voltage drop mode to obtain a plurality of drop mode groups; Identify the fault phase of each voltage drop mode in each drop mode group, and sort the voltage drop modes in each drop mode group in order of the fault phase from small to large, to obtain a first voltage drop sequence of each drop 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 arranged and combined to obtain a simulation operating condition list of the electrical nodes.

4. The method according to claim 3, characterized in that Based on the simulation working condition list, respectively simulating the operation process of the power grid structure model and the commutation failure resistance structure model 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 fault condition information obtained by combining each voltage drop mode and each voltage drop depth in the simulation condition list; Inputting the historical operation data information and the simulation condition list into the power grid structure model, simulating each fault condition information respectively, obtaining the simulation result of the power grid structure model for each fault condition information, and identifying the commutation result information corresponding to the simulation result; 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 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 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 comprises: In the commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information, filter the commutation failure record information whose commutation result information is commutation failure, and identify the number of 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 commutation result information of the commutation record information corresponding to each fault condition information in the first commutation record information is returned to execute, and the commutation failure record information step of the commutation result information is screened out as the commutation failure, to obtain the 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, the commutation failure defense capability information of the commutation failure defense system includes: In the historical power grid operation database, when there is no commutation failure protection system, in each of the fault operating condition information in the simulation operating condition list, it is searched whether there is a first target fault operating condition with commutation result information, and the commutation result information of the first target fault operating condition is used as the first actual commutation information of each of the first target fault operating conditions; In the historical power grid operation database, when there is a commutation failure protection system, in each of the fault condition information in the simulation condition list, it is searched whether there is a second target fault condition with commutation result information, and the commutation result information of the second target fault condition is used as the second actual commutation information of each of the second target fault conditions; 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 through a defense capability algorithm.

7. A device for determining commutation failure defense capability information, characterized in that: The device comprises: An acquisition module, used for acquiring various voltage drop modes of electrical nodes of an AC power grid, various 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 power grid structure model of the AC power grid and a commutation failure resistance structure 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; A simulation module, for 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, 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, 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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