Method and apparatus for identifying the operating mode of a multi-terminal DC system in a power grid

Abstract

This application relates to a method and apparatus for identifying the operating mode of a multi-terminal DC system in a power grid. The method includes: acquiring operating status information of the multi-terminal DC system; analyzing the topological connections of the multi-terminal DC system based on the operating status information and determining the line connection methods of each DC pole; analyzing the operating modes corresponding to at least two terminal DC systems in the multi-terminal DC system based on the line connection methods of the DC poles; encoding the operating modes corresponding to each terminal DC system to obtain a combined operating mode code; and determining the system operating mode of the multi-terminal DC system based on the combined operating mode code. This method can establish the relationship between the operating modes of terminal DC systems and the operating modes of the multi-terminal DC system using encoding. By identifying the codes corresponding to the operating modes of the multi-terminal DC system, the current operating mode of the multi-terminal DC system can be obtained in real time, improving the identification efficiency of the operating mode of the multi-terminal DC system.

Description

Technical Field

[0001] This application relates to the field of power dispatching, and in particular to a method, apparatus, computer equipment, storage medium, and computer program product for identifying the operating mode of a multi-terminal DC system of a power grid. Background Technology

[0002] A multi-terminal DC transmission system consists of three or more converter stations and DC transmission lines connecting the converter stations. It has three or more connection ports to the AC system or power plant, enabling multiple power supply areas to supply power to multiple load centers.

[0003] Multi-terminal DC transmission systems offer flexible operation modes, fully leveraging the economic advantages and flexibility of DC transmission. However, this flexibility also presents challenges for power dispatching. The wiring of DC transmission lines between converter stations in multi-terminal DC transmission systems is complex. Each converter station is considered a single DC system, typically containing two DC poles. Besides outages, there are multiple possible operating modes. Furthermore, the combination of these operating modes means that, in actual power dispatching, the number of possible operating modes for a multi-terminal DC transmission system increases exponentially with the number of terminals. This makes it difficult for dispatchers to monitor the dynamic operating modes of multi-terminal DC systems in real time and hinders the efficiency of identifying real-time operating modes. Summary of the Invention

[0004] Based on this, it is necessary to provide a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for identifying the operation mode of a multi-terminal DC system in a power grid, which can improve the efficiency of real-time operation mode identification of multi-terminal DC systems.

[0005] In a first aspect, this application provides a method for identifying the operating mode of a multi-terminal DC system in a power grid, the method comprising:

[0006] To obtain the operating status information of each DC pole and DC line in a multi-terminal DC system of the power grid;

[0007] Based on the operating status information, the topological connection relationship of the multi-terminal DC system of the power grid is analyzed, and the line connection mode of each DC pole in the multi-terminal DC system of the power grid is determined.

[0008] Based on the line connection method of the DC pole, analyze the operation mode of at least two terminal DC systems in the multi-terminal DC system of the power grid;

[0009] The operating modes corresponding to each of the aforementioned DC systems are encoded to obtain a combined operating mode code.

[0010] The system operation mode of the multi-terminal DC system of the power grid is determined based on the combination code of the operation mode.

[0011] In one embodiment, analyzing the operating modes of at least two terminal DC systems in the multi-terminal DC system of the power grid based on the line connection method of the DC pole includes:

[0012] Obtain the mapping relationship between the line connection method and the operation mode of the terminal DC system;

[0013] Based on the line connection method of the DC pole, the corresponding operating mode of each terminal DC system is queried from the mapping relationship.

[0014] In one embodiment, the step of analyzing the topological connection relationship of the multi-terminal DC system of the power grid based on the operating status information and determining the line connection mode of each DC pole in the multi-terminal DC system of the power grid includes:

[0015] Based on the operating status information and the topological connection relationship, the number of DC lines connected to each DC pole in the multi-terminal DC system of the power grid is obtained;

[0016] Based on the quantity, determine the line connection method of each DC pole in the multi-terminal DC system of the power grid.

[0017] In one embodiment, obtaining the number of DC lines connected to each DC pole in the multi-terminal DC system of the power grid based on the operating status information and the topology connection relationship includes:

[0018] Based on the operating status information and the topological connection relationship, the switching status between each DC pole and the DC line in the multi-terminal DC system of the power grid is obtained;

[0019] The connection status of each DC pole to the DC line is determined based on the opening and closing status.

[0020] Based on the connection status, determine the number of DC lines connected to each DC pole.

[0021] In one embodiment, the step of encoding the operating mode corresponding to each of the said terminal DC systems to obtain the operating mode combination code includes:

[0022] Obtain the code corresponding to each of the described operating modes;

[0023] The codes are combined to obtain the combined codes for the operating mode.

[0024] In one embodiment, identifying the operating mode combination code to determine the system operating mode of the multi-terminal DC power grid system includes:

[0025] Based on the combination of the operating mode codes, the system code corresponding to the system operating mode is determined;

[0026] The system code is identified to determine the system's operating mode.

[0027] Secondly, this application also provides an operating mode identification device for a multi-terminal DC power grid system, the device comprising:

[0028] The acquisition module is used to acquire the operating status information of each DC pole and DC line in the multi-terminal DC system of the power grid;

[0029] The judgment module is used to analyze the topological connection relationship of the multi-terminal DC system of the power grid based on the operating status information, and determine the line connection mode of each DC pole in the multi-terminal DC system of the power grid.

[0030] The analysis module is used to analyze the operating mode of at least two terminal DC systems in the multi-terminal DC system of the power grid based on the line connection method of the DC pole.

[0031] The encoding module is used to encode the operating mode corresponding to each of the aforementioned DC systems to obtain the operating mode combination code;

[0032] The identification module is used to determine the system operation mode of the multi-terminal DC system of the power grid based on the combination of codes of the operation mode.

[0033] Thirdly, this application also provides a computer device, the computer device including a memory and a processor, the memory storing a computer program, and the processor executing the computer program to perform the following steps:

[0034] To obtain the operating status information of each DC pole and DC line in a multi-terminal DC system of the power grid;

[0035] Based on the operating status information, the topological connection relationship of the multi-terminal DC system of the power grid is analyzed, and the line connection mode of each DC pole in the multi-terminal DC system of the power grid is determined.

[0036] Based on the line connection method of the DC pole, analyze the operation mode of at least two terminal DC systems in the multi-terminal DC system of the power grid;

[0037] The operating modes corresponding to each of the aforementioned DC systems are encoded to obtain a combined operating mode code.

[0038] The system operation mode of the multi-terminal DC system of the power grid is determined based on the combination code of the operation mode.

[0039] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described in any of the preceding aspects.

[0040] Fifthly, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the method described in any of the preceding aspects.

[0041] The aforementioned method, apparatus, computer equipment, storage medium, and computer program product for identifying the operating mode of a multi-terminal DC system in a power grid acquires the operating status information of each DC pole and DC line in the multi-terminal DC system, analyzes the topological connection relationship of the multi-terminal DC system, and determines the line connection mode of each DC pole in the multi-terminal DC system based on the operating status information and topological connection relationship, thereby clarifying the topological connection characteristics in the multi-terminal DC system. Based on the line connection mode of the DC pole, it analyzes the operating mode corresponding to at least two terminal DC systems in the multi-terminal DC system, realizing the discrimination of the operating mode corresponding to each terminal DC system in the multi-terminal DC system. Then, it encodes the operating mode corresponding to each terminal DC system, obtains the operating mode combination code from the encoding of the operating mode corresponding to each terminal DC system, and determines the system operating mode of the multi-terminal DC system by identifying the operating mode combination code corresponding to the multi-terminal DC system. It can realize the discrimination of the system operating mode of the multi-terminal DC system based on code recognition, update the system operating mode of the multi-terminal DC system in real time, and improve the identification efficiency of the system operating mode of the multi-terminal DC system. Attached Figure Description

[0042] To better describe and illustrate the embodiments and examples disclosed herein, reference may be made to one or more accompanying drawings. Additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed inventions, the currently described embodiments and / or examples, or the best mode of these inventions as currently understood.

[0043] Figure 1 This is an application environment diagram of a method for identifying the operating mode of a multi-terminal DC system in a power grid, as shown in one embodiment.

[0044] Figure 2 This is a flowchart illustrating a method for identifying the operating mode of a multi-terminal DC system in a power grid, as shown in one embodiment.

[0045] Figure 3 This is a schematic diagram of the structure of a multi-terminal DC power grid system in one embodiment;

[0046] Figure 4 This is a flowchart illustrating one operation mode of a determined-end DC system in one embodiment;

[0047] Figure 5This is a flowchart illustrating one embodiment of determining the DC pole line connection method;

[0048] Figure 6 This is a schematic diagram of a process for determining the number of DC poles connected to DC lines in one embodiment;

[0049] Figure 7 This is a flowchart illustrating a method for determining a combination of operating modes in one embodiment;

[0050] Figure 8 This is a flowchart illustrating one embodiment of determining a system operation mode;

[0051] Figure 9 This is a structural block diagram of an operation mode identification device for a multi-terminal DC power grid system in one embodiment;

[0052] Figure 10 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0054] The method for identifying the operating mode of a multi-terminal DC system in a power grid, as provided in this application, can be applied to, for example... Figure 1 In the application environment shown, terminal 102 communicates with server 104 via a network. A data storage system can store the data that server 104 needs to process. The data storage system can be integrated onto server 104 or placed on a cloud or other network server. Server 104 acquires the operating status information of each DC pole and DC line in the multi-terminal DC system of the power grid. Based on the operating status information, server 104 analyzes the topological connection relationship of the multi-terminal DC system of the power grid and determines the line connection mode of each DC pole in the multi-terminal DC system of the power grid. Based on the line connection mode of the DC pole, server 104 analyzes the operating mode corresponding to at least two terminal DC systems in the multi-terminal DC system of the power grid. Server 104 encodes the operating mode corresponding to each terminal DC system to obtain an operating mode combination code. Based on the operating mode combination code, server 104 determines the system operating mode of the multi-terminal DC system of the power grid. Server 104 can be implemented using a standalone server or a server cluster composed of multiple servers.

[0055] Understandably, this method can also be applied to servers, and to systems that include both terminals and servers, and can be implemented through the interaction between terminals and servers.

[0056] In one exemplary embodiment, such as Figure 2 As shown, a method for identifying the operating mode of a multi-terminal DC system in a power grid is provided, which can be applied to... Figure 1 The following steps are used as an example:

[0057] S202, obtain the operating status information of each DC pole and DC line in the multi-terminal DC system of the power grid.

[0058] Among them, a multi-terminal DC power grid system can refer to a power transmission system consisting of three or more converter stations connected in a certain way.

[0059] Among them, DC pole can refer to DC line pole.

[0060] Among them, the branch line can refer to the overhead power transmission line connecting the two converter stations.

[0061] Among them, topology connection information can refer to the information corresponding to the connection characteristics between the DC pole and the DC line.

[0062] As an example, the terminal identifies the location of each DC pole and branch line in the multi-terminal DC system of the power grid, and determines the connection relationship between the DC pole and the DC line based on the connection characteristics of each DC pole and the DC line, thereby obtaining the topological connection information of the DC pole and the DC line.

[0063] S204. Based on the operating status information, analyze the topological connection relationship of the multi-terminal DC system of the power grid, and determine the line connection mode of each DC pole in the multi-terminal DC system of the power grid.

[0064] In practical applications, multi-terminal DC systems for power grids can include two-terminal DC systems and three-terminal DC systems. A schematic diagram of a multi-terminal DC system for power grids can be shown as follows: Figure 3 As shown.

[0065] Among them, the line connection method can refer to the connection method between each DC pole and the DC line in a multi-terminal DC system of the power grid. In practical applications, the line connection method includes, but is not limited to, isolated connection method, single-line connection method, double-line connection method and four-line connection method.

[0066] As an example, the terminal determines the line connection mode of each DC pole in the multi-terminal DC system of the power grid based on the topology connection information of the DC pole and the DC line and on preset discrimination requirements. For example: when the DC pole is not connected to any DC line, the terminal sets the line connection mode of the DC pole to an isolated connection mode; when the DC pole is connected to a single DC line, the terminal sets the line connection mode of the DC pole to a single-line connection mode; when the DC pole is connected to two DC lines, the terminal sets the line connection mode of the DC pole to a two-line connection mode; when the DC pole is connected to four DC lines, the terminal sets the line connection mode of the DC pole to a four-line connection mode.

[0067] S206, Based on the line connection method of the DC pole, analyze the operation mode of at least two terminal DC systems in the multi-terminal DC system of the power grid.

[0068] Among them, the terminal DC system can refer to the DC system included in the multi-terminal DC system of the power grid.

[0069] In practical applications, the operating modes corresponding to the DC system include, but are not limited to, shutdown mode, single-line earth return operation mode, double-line earth return operation mode, single-line metal return operation mode, bipolar operation mode, and non-operation mode.

[0070] As an example, based on the line connection methods of the two DC poles in the terminal DC system and according to preset discrimination requirements, the terminal determines the operating mode of at least two terminal DC systems in the multi-terminal DC system of the power grid. For example: if both DC pole 1 and DC pole 2 are isolated connections in the terminal DC system, the terminal sets the operating mode of that terminal DC system to shutdown mode; if DC pole 1 and DC pole 2 are single-line connections and isolated connections respectively in the terminal DC system, the terminal sets the operating mode of that terminal DC system to pole 1 single-line ground return operation mode; if DC pole 1 and DC pole 2 are single-line connections and isolated connections respectively in the terminal DC system, the terminal sets the operating mode of that terminal DC system to pole 1 single-line ground return operation mode; if DC pole 1 and DC pole 2 are isolated connections and isolated connections respectively in the terminal DC system, the terminal sets the operating mode of that terminal DC system to pole 1 single-line ground return operation mode. In the case of isolated connection and single-line connection, the terminal sets the operation mode of the DC system at this end to single-line ground return operation mode for pole 2. In the DC system at this end, if the line connection methods for DC pole 1 and DC pole 2 are respectively double-line connection and isolated connection mode, and the double lines are connected to different DC systems on opposite sides, the terminal sets the operation mode of the DC system at this end to single-line ground return operation mode for pole 1; if the double lines are connected in parallel, the terminal sets the operation mode of the DC system at this end to double-line ground return operation mode for pole 1; if the double lines are connected in series, the terminal sets the operation mode of the DC system at this end to double-line metal return operation mode for pole 1. In the DC system at this end, the line connection methods for DC pole 1 and DC pole 2 are... When the connection methods are isolated connection and double-wire connection, if the double wires are connected to different DC systems on opposite sides, the terminal sets the operation mode of the DC system at that end to single-wire ground return operation mode (Pole 2). If the double wires are connected in parallel, the terminal sets the operation mode of the DC system at that end to double-wire ground return operation mode (Pole 2). If the double wires are connected in series, the terminal sets the operation mode of the DC system at that end to single-wire metal return operation mode (Pole 2). In the DC system at that end, if both DC pole 1 and DC pole 2 are single-wire connections or both are double-wire connections, the terminal sets the operation mode of the DC system at that end to bipolar operation mode. When the line connection methods of DC pole 1 and DC pole 2 are respectively four-wire connection and isolated connection, if the two groups of four wires are running in parallel, the terminal sets the operation mode of the DC system at this end to pole 1 double-wire ground return operation mode. If the two groups of four wires are running in series, the terminal sets the operation mode of the DC system at this end to pole 1 single-wire metal return operation mode. In the DC system at this end, when the line connection methods of DC pole 1 and DC pole 2 are respectively isolated connection and four-wire connection, if the two groups of four wires are running in parallel, the terminal sets the operation mode of the DC system at this end to pole 2 double-wire ground return operation mode. If the two groups of four wires are running in series, the terminal sets the operation mode of the DC system at this end to pole 2 single-wire metal return operation mode.

[0071] S208, the operating mode corresponding to each of the aforementioned DC systems is encoded to obtain the operating mode combination code.

[0072] Among them, the combination code of the operating mode can refer to the code obtained by combining the codes of the operating modes corresponding to each DC system.

[0073] As an example, the terminal encodes the operating modes corresponding to each DC system according to preset encoding requirements, obtaining the operating mode codes for each DC system. These operating mode codes are then combined to obtain a combined operating mode code. For instance, the terminal encodes the shutdown mode as M1, the single-line earth return operation mode of pole 1 as M2, the single-line earth return operation mode of pole 2 as M3, the double-line earth return operation mode of pole 1 as M4, the double-line earth return operation mode of pole 2 as M5, the single-line metal return operation mode of pole 1 as M6, the single-line metal return operation mode of pole 2 as M7, the bipolar operation mode as M8, and the non-operation mode as M9. The terminal combines the operating mode codes corresponding to each DC system in the multi-terminal DC system of the power grid to obtain the combined operating mode code. Based on the combined operating mode code, the system code S{R1, R2, ..., Rn} corresponding to the system operating mode is determined, where Ri is the operating mode code corresponding to the i-th DC system in the multi-terminal DC system of the power grid.

[0074] S210, determine the system operation mode of the multi-terminal DC system of the power grid according to the combination code of the operation mode.

[0075] As an example, if the operating mode combination code is M1M1M1, the terminal determines the system operating mode as the three-terminal shutdown mode based on the preset correspondence.

[0076] In the aforementioned method for identifying the operating mode of a multi-terminal DC system in a power grid, the operating status information of each DC pole and DC line in the multi-terminal DC system is obtained, the topological connection relationship of the multi-terminal DC system is analyzed, and the line connection mode of each DC pole in the multi-terminal DC system is determined based on the operating status information and the topological connection relationship, thereby clarifying the topological connection characteristics in the multi-terminal DC system. Based on the line connection mode of the DC pole, the operating mode corresponding to at least two terminal DC systems in the multi-terminal DC system is analyzed, thereby realizing the discrimination of the operating mode corresponding to each terminal DC system in the multi-terminal DC system. Then, the operating mode corresponding to each terminal DC system is encoded, and the operating mode combination code is obtained from the encoding of the operating mode corresponding to each terminal DC system. Based on the operating mode combination code, the system operating mode of the multi-terminal DC system is determined by identifying the operating mode combination code corresponding to the multi-terminal DC system. The system operating mode of the multi-terminal DC system can be discerned based on the encoding recognition, and the system operating mode of the multi-terminal DC system can be updated in real time, thereby improving the identification efficiency of the system operating mode of the multi-terminal DC system.

[0077] In one exemplary embodiment, such as Figure 4 As shown, the step of analyzing the operating modes of at least two terminal DC systems in the multi-terminal DC system of the power grid based on the line connection method of the DC pole includes:

[0078] S402, Obtain the mapping relationship between the line connection method and the operation mode of the terminal DC system.

[0079] The mapping relationship can refer to the rules that characterize the correspondence between the line connection method of the DC pole of the terminal DC system and the operation mode of the terminal DC system. In practical applications, the mapping relationship can include a mapping table.

[0080] For ease of understanding by those skilled in the art, Table 1 provides an exemplary mapping table;

[0081]

[0082] Table 1

[0083] S404, based on the line connection method of the DC pole, query the corresponding operating mode of each terminal DC system in the mapping relationship.

[0084] In practical applications, when the DC pole is not connected to any DC line, the line connection method of the DC pole can be an isolated connection method; when the DC pole is connected to a single DC line, the line connection method of the DC pole can be a single-wire connection method; when the DC pole is connected to two DC lines, the line connection method of the DC pole can be a two-wire connection method; when the DC pole is connected to four DC lines, the line connection method of the DC pole can be a four-wire connection method.

[0085] In this embodiment, by obtaining the mapping relationship between the line connection method of the DC pole and the operation mode of the terminal DC system, and then querying the corresponding operation mode of each terminal DC system according to the mapping relationship, a connection can be established between the line connection method of the DC pole and the operation mode of the terminal DC system through the mapping relationship, so as to promptly determine the operation mode of the terminal DC system according to the line connection method, and provide a basis for judging the system operation mode.

[0086] In one exemplary embodiment, such as Figure 5 As shown, the step of analyzing the topological connection relationship of the multi-terminal DC system of the power grid based on the operating status information and determining the line connection mode of each DC pole in the multi-terminal DC system of the power grid includes:

[0087] S502, based on the operating status information and the topology connection relationship, obtain the number of DC lines connected to each DC pole in the multi-terminal DC system of the power grid.

[0088] As an example, the terminal determines the number of DC lines connected to each DC pole based on the connection relationship between each DC pole and the DC line in the topology connection information.

[0089] S504, Based on the quantity, determine the line connection method of each DC pole in the multi-terminal DC system of the power grid.

[0090] As an example, in a certain DC system, when DC pole 1 is simultaneously connected to DC line A and DC line B via a switch, the terminal sets the line connection mode of DC pole 1 to a two-line connection.

[0091] In this embodiment, the number of DC lines connected to the DC pole is determined by the topology connection information, thereby determining the line connection method of the DC pole. This allows for timely judgment of the line connection method of the DC pole based on the topology connection information, improving the identification efficiency of the line connection method of the DC pole.

[0092] In one exemplary embodiment, such as Figure 6 As shown, obtaining the number of DC lines connected to each DC pole in the multi-terminal DC system of the power grid based on the operating status information and the topology connection relationship includes:

[0093] S602, based on the operating status information and the topological connection relationship, obtain the switching status between each DC pole and the DC line in the multi-terminal DC system of the power grid.

[0094] In this context, a switch can refer to a circuit element used to connect the DC poles and DC lines in a multi-terminal DC system of a power grid.

[0095] S604, determine the connection status of each DC pole to the DC line based on the open / closed state.

[0096] The connection status can refer to whether the DC pole and the DC line are connected. In practical applications, the connection status can include both connected and disconnected states.

[0097] As an example, when the switch between the DC pole and the DC line is closed, the terminal sets the connection status between the DC pole and the DC line to the ON state; when the switch between the DC pole and the DC line is disconnected, the terminal sets the connection status between the DC pole and the DC line to the OFF state.

[0098] S606, Based on the connection status, determine the number of DC lines connected to each DC pole.

[0099] As an example, the terminal records the number of DC lines connected to the DC pole based on the connection status of the DC pole and the DC line, and can also store the data corresponding to the above number in the connection record table.

[0100] In this embodiment, by determining the open / closed state of the switch between the DC pole and the branch line, and counting the number of branch lines connected by the DC pole, the topological connection characteristics of the multi-terminal DC system of the power grid can be reflected in real time according to the open / closed state of the switch, and the accurate number of branch lines connected by the DC pole can be obtained, thereby improving the identification efficiency of the DC pole connection mode.

[0101] In one exemplary embodiment, such as Figure 7 As shown, the encoding process for the operating modes corresponding to each of the aforementioned DC systems to obtain the operating mode combination code includes:

[0102] S702, obtain the code corresponding to each of the described operating modes.

[0103] As an example, the terminal obtains the code corresponding to the operating mode of each DC system, which may include, but is not limited to, M1, M2, M3, M4, M5, M6, M7, M8 and M9.

[0104] S704, combine the codes to obtain the combined code of the operating mode.

[0105] As an example, if a multi-terminal DC system of a power grid includes three terminal DC systems, namely Terminal 1 DC system, Terminal 2 DC system and Terminal 3 DC system, and the operating mode of the above three terminal DC systems is out of service, then the code corresponding to the operating mode of the above three terminal DC systems is M1, and the combined operating mode code is M1M1M1.

[0106] In this embodiment, by encoding and combining the operating modes of the terminal DC system, an operating mode combination code is obtained. The operating mode of the terminal DC system can be clearly identified through the encoding method. The codes of the operating modes of each terminal DC system in the multi-terminal DC system of the power grid are combined to accurately indicate the operating mode of each terminal DC system in the multi-terminal DC system of the power grid, providing a basis for determining the system operating mode.

[0107] In one exemplary embodiment, such as Figure 8 As shown, identifying the combination code of the operating mode to determine the system operating mode of the multi-terminal DC system of the power grid includes:

[0108] S802, determine the system code corresponding to the system operation mode based on the combination code of the operation mode.

[0109] System coding can refer to coding used to determine the system's operating mode.

[0110] As an example, if the operating mode combination code is M1M1M1, the terminal determines the system code corresponding to the system operating mode as S111 based on the preset correspondence.

[0111] S804, identify the system code to obtain the system operation mode.

[0112] As an example, when the system code is S111, the terminal sets the system operation mode to three-terminal shutdown mode.

[0113] In this embodiment, the system code corresponding to the system operation mode is determined by combining the operation mode codes, and the system code is identified to obtain the system operation mode. Based on the combination of operation mode codes, dynamic system codes can be obtained in real time, thereby improving the efficiency of system operation mode identification.

[0114] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0115] Based on the same inventive concept, this application also provides an operating mode identification device for a multi-terminal DC system of a power grid, used to implement the above-described method for identifying the operating mode of a multi-terminal DC system of a power grid. The solution provided by this device is similar to the solution described in the above-described method. Therefore, the specific limitations in one or more embodiments of the operating mode identification device for a multi-terminal DC system of a power grid provided below can be found in the limitations of the operating mode identification method for a multi-terminal DC system of a power grid described above, and will not be repeated here.

[0116] In one embodiment, such as Figure 9 As shown, a device for identifying the operating mode of a multi-terminal DC system in a power grid is provided, comprising: an acquisition module 910, a judgment module 920, an analysis module 930, an encoding module 940, and an identification module 950, wherein:

[0117] The acquisition module 910 is used to acquire the operating status information of each DC pole and DC line in the multi-terminal DC system of the power grid;

[0118] The judgment module 920 is used to analyze the topological connection relationship of the multi-terminal DC system of the power grid based on the operating status information, and determine the line connection mode of each DC pole in the multi-terminal DC system of the power grid.

[0119] Analysis module 930 is used to analyze the operating mode of at least two terminal DC systems in the multi-terminal DC system of the power grid according to the line connection method of the DC pole;

[0120] The encoding module 940 is used to encode the operating mode corresponding to each of the aforementioned terminal DC systems to obtain the operating mode combination code;

[0121] The identification module 950 is used to determine the system operation mode of the multi-terminal DC system of the power grid based on the combination code of the operation mode.

[0122] In an exemplary embodiment, the analysis module 930 is specifically used to obtain the mapping relationship between the line connection method and the operation mode of the terminal DC system, and to query the operation mode corresponding to each terminal DC system in the mapping relationship according to the line connection method of the DC pole.

[0123] In an exemplary embodiment, the determination module 920 is specifically used to obtain the number of DC lines connected to each DC pole in the multi-terminal DC system of the power grid based on the operating status information and the topology connection relationship, and to determine the line connection mode of each DC pole in the multi-terminal DC system of the power grid based on the number.

[0124] In an exemplary embodiment, the aforementioned judgment module 920 is further specifically configured to obtain the switching status of each DC pole and the DC line in the multi-terminal DC system of the power grid based on the operating status information and the topological connection relationship, determine the connection status of each DC pole and the DC line based on the switching status, and determine the number of DC lines connected to each DC pole based on the connection status.

[0125] In an exemplary embodiment, the encoding module 940 is specifically used to obtain the encoding corresponding to each of the operating modes, and to combine the encodings to obtain the operating mode combination encoding.

[0126] In an exemplary embodiment, the identification module 950 is specifically used to determine the system code corresponding to the system operation mode based on the combination code of the operation mode, identify the system code, and obtain the system operation mode.

[0127] Each module in the aforementioned multi-terminal DC system operation mode identification device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the corresponding operations of each module.

[0128] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 10 As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When executed by the processor, the computer program implements a method for identifying the operating mode of a multi-terminal DC system in a power grid. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0129] Those skilled in the art will understand that Figure 10 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0130] In one embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0131] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0132] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0133] 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, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data shall comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0134] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this 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), magnetic 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. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0135] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0136] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for identifying the operating mode of a multi-terminal DC system of a power grid, characterized in that The method includes: To obtain the operating status information of each DC pole and DC line in a multi-terminal DC system of the power grid; Based on the operating status information, the topological connection relationship of the multi-terminal DC system of the power grid is analyzed, and the line connection mode of each DC pole in the multi-terminal DC system of the power grid is determined. Based on the line connection method of the DC pole, analyze the operating mode of at least two terminal DC systems in the multi-terminal DC system of the power grid; further includes: obtaining the mapping relationship between the line connection method and the operating mode of the terminal DC system; based on the line connection method of the DC pole, query the operating mode corresponding to each terminal DC system in the mapping relationship; The operating modes corresponding to each of the aforementioned DC systems are encoded to obtain a combined operating mode code. The system operation mode of the multi-terminal DC system of the power grid is determined based on the combination code of the operation mode.

2. The method according to claim 1, characterized in that, The step of analyzing the topological connection relationship of the multi-terminal DC system of the power grid based on the operating status information and determining the line connection mode of each DC pole in the multi-terminal DC system of the power grid includes: Based on the operating status information and the topological connection relationship, the number of DC lines connected to each DC pole in the multi-terminal DC system of the power grid is obtained; Based on the quantity, determine the line connection method of each DC pole in the multi-terminal DC system of the power grid.

3. The method according to claim 2, characterized in that, The step of obtaining the number of DC lines connected to each DC pole in the multi-terminal DC system of the power grid based on the operating status information and the topology connection relationship includes: Based on the operating status information and the topological connection relationship, the switching status between each DC pole and the DC line in the multi-terminal DC system of the power grid is obtained; The connection status of each DC pole to the DC line is determined based on the opening and closing status. Based on the connection status, determine the number of DC lines connected to each DC pole.

4. The method according to claim 1, characterized in that, The step of encoding the operating mode corresponding to each of the aforementioned terminal DC systems to obtain the operating mode combination code includes: Obtain the code corresponding to each of the described operating modes; The codes are combined to obtain the combined codes for the operating mode.

5. The method according to claim 1, characterized in that, The process of identifying the combination code of the operating mode to determine the system operating mode of the multi-terminal DC system of the power grid includes: Based on the combination of the operating mode codes, the system code corresponding to the system operating mode is determined; The system code is identified to determine the system's operating mode.

6. A device for identifying the operating mode of a multi-terminal DC power grid system, characterized in that, The device includes: The acquisition module is used to acquire the operating status information of each DC pole and DC line in the multi-terminal DC system of the power grid; The judgment module is used to analyze the topological connection relationship of the multi-terminal DC system of the power grid based on the operating status information, and determine the line connection mode of each DC pole in the multi-terminal DC system of the power grid. The analysis module is used to analyze the operating modes of at least two terminal DC systems in the multi-terminal DC system of the power grid according to the line connection method of the DC pole; it is further used to obtain the mapping relationship between the line connection method and the operating modes of the terminal DC systems; and to query the operating modes of each terminal DC system from the mapping relationship according to the line connection method of the DC pole. The encoding module is used to encode the operating mode corresponding to each of the aforementioned DC systems to obtain the operating mode combination code; The identification module is used to determine the system operation mode of the multi-terminal DC system of the power grid based on the combination of codes of the operation mode.

7. The apparatus according to claim 6, characterized in that, The judgment module is further configured to obtain the number of DC lines connected to each DC pole in the multi-terminal DC system of the power grid based on the operating status information and the topology connection relationship; and determine the line connection method of each DC pole in the multi-terminal DC system of the power grid based on the number.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

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