Modeling and visualization of geomagnetic induced current based on graph network

Abstract

The present invention discloses a method for modeling and visualizing geomagnetic induction currents based on a graph network, comprising: constructing a graph network corresponding to a multi-voltage power network; constructing a computational model for geomagnetic induction currents in the power network; and characterizing the geomagnetic induction currents in the power network based on the graph network and the computational model. The present invention achieves efficient modeling of geomagnetic induction currents in the power grid and visualizes the power grid and the magnitude of the geomagnetic induction currents using a graph network. This method provides the power grid with strong self-verification and expansion capabilities, thereby saving significant manpower, material, and financial resources and making large-scale geomagnetic induction current modeling feasible.

Description

Technical Field

[0001] The present invention relates to the field of computer data processing technology, and in particular to a geomagnetic induction current modeling and visualization method based on a graph network. Background Art

[0002] Geomagnetically induced currents (GICs) are induced currents in conductors caused by strong induced electric fields during strong disturbances in the Earth's magnetic field. These currents can last from seconds to hours. These disturbances are typically caused by solar activity and are known as geomagnetic storms. When a geomagnetic storm occurs, the disturbance in geomagnetically induced currents in power grid systems can cause transformer core half-cycle saturation, increasing harmonic generation and reactive power absorption. This can lead to transformer hotspot heating, false protection of grid equipment, and widespread power outages, potentially threatening the safety of the entire power grid system, significantly impacting its safe operation.

[0003] Therefore, it is particularly important to be able to effectively monitor the geomagnetic induced currents in the power grid during geomagnetic storms. The current conventional method is to use various devices to record the changes in the total ground magnetic field during geomagnetic storms, reconstruct the geomagnetic field on the Earth's surface, and then calculate the induced geoelectric field. Then, by building a power grid model, the geomagnetic induced currents flowing through the grid can be manually calculated. However, due to my country's "West-to-East Power Transmission" and the construction of long-distance power transmission systems, the power grid structure is extremely complex. Modeling the geomagnetic induced currents in the power grid requires a lot of manpower, material and financial resources, and lacks effective visualization methods. Summary of the Invention

[0004] The main purpose of the present invention is to provide a geomagnetic induction current modeling and visualization method based on a graph network, aiming to solve the technical problems of low efficiency in monitoring geomagnetic induction current in power grids and lack of effective visualization means.

[0005] To achieve the above object, the present invention provides a method for modeling and visualizing geomagnetic induced current based on a graph network, the method comprising the following steps:

[0006] Construct a graph network corresponding to a multi-voltage power network;

[0007] Constructing a calculation model of geomagnetic induced current in the power network;

[0008] The geomagnetic induced current in the power network is characterized based on the graph network and the calculation model.

[0009] Preferably, the step of constructing a calculation model of geomagnetic induction current in the power network includes:

[0010] Obtaining a network admittance matrix and a ground impedance matrix between nodes of the power network;

[0011] Obtaining a column matrix composed of the in-ground geomagnetic induction current of each of the nodes;

[0012] The calculation model is constructed based on the network admittance matrix, the ground impedance matrix and the column matrix.

[0013] Preferably, the step of obtaining a column matrix composed of the in-ground geomagnetic induction currents of each of the nodes includes:

[0014] Determining the equivalent input voltage corresponding to each of the nodes based on a preset electric field;

[0015] determining, based on the equivalent input voltage and the equivalent resistance corresponding to each of the nodes, an in-ground geomagnetic induction current of each of the nodes;

[0016] The column matrix is determined based on the in-ground geomagnetic induction current.

[0017] Preferably, the step of determining the equivalent input voltage corresponding to each of the nodes based on the preset electric field includes:

[0018] Using a uniform electric field as the preset electric field;

[0019] The equivalent input voltage is determined based on the uniform electric field and the geographical information of each of the nodes.

[0020] Preferably, the step of obtaining a network admittance matrix and a ground impedance matrix between nodes of the power network includes:

[0021] determining the conductor resistivity of the power network based on the equivalent resistance corresponding to each of the nodes;

[0022] The network admittance matrix and the ground impedance matrix are determined based on the conductor resistivity.

[0023] Preferably, the step of constructing a graph network corresponding to a multi-voltage power network includes:

[0024] Obtaining geographic information, electrical data, and transmission lines of each node in the power network;

[0025] The map network is constructed based on the geographic information, the electrical data and the transmission lines.

[0026] Preferably, the step of characterizing the geomagnetic induced current in the power network based on the graph network and the calculation model includes:

[0027] When geomagnetic induction current is generated in the power network, current data is obtained based on the calculation model;

[0028] The current data is represented based on the graph network for visualization.

[0029] Preferably, after the step of constructing a graph network corresponding to a multi-voltage power network, the method further includes:

[0030] monitoring the power network for newly added nodes;

[0031] If the newly added node exists, obtain the node parameters corresponding to the newly added node;

[0032] The graph network is updated based on the node parameters.

[0033] In addition, to achieve the above-mentioned purpose, the present invention also provides a geomagnetic induction current modeling and visualization device, which includes: a memory, a processor, and a geomagnetic induction current modeling and visualization program stored in the memory and executable on the processor. When the geomagnetic induction current modeling and visualization program is executed by the processor, the steps of the geomagnetic induction current modeling and visualization method described above are implemented.

[0034] In addition, to achieve the above-mentioned purpose, the present invention also provides a computer-readable storage medium, on which a geomagnetic induction current modeling and visualization program is stored. When the geomagnetic induction current modeling and visualization program is executed by a processor, the steps of the geomagnetic induction current modeling and visualization method as described above are implemented.

[0035] The proposed graph network-based geomagnetic induced current modeling and visualization method constructs a graph network corresponding to a multi-voltage power grid; builds a computational model for geomagnetic induced currents in the power grid; and characterizes the geomagnetic induced currents in the power grid based on the graph network and the computational model. This method achieves efficient modeling of geomagnetic induced currents in the power grid and visualizes the grid and geomagnetic induced currents using a graph network. This method provides the power grid with strong self-verification and scalability, saving significant manpower, material, and financial resources and making large-scale geomagnetic induced current modeling feasible. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of the structure of the geomagnetic induction current modeling and visualization device in the hardware operating environment involved in the embodiment of the present invention;

[0037] Figure 2 This is a flow chart of the first embodiment of the geomagnetic induction current modeling and visualization method based on the graph network of the present invention;

[0038] Figure 3 It is a module of the geomagnetic induction current modeling and visualization device in one embodiment of the present invention.

[0039] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0040] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] Figure 1 It is a structural diagram of a geomagnetic induction current modeling and visualization device in a hardware operating environment involved in an embodiment of the present invention.

[0042] The terminal in the embodiment of the present invention may be a PC, or may be a mobile terminal device with a display function, such as a smart phone, a tablet computer, or a portable computer.

[0043] like Figure 1 As shown, the geomagnetic induction current modeling and visualization device may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, and a communication bus 1002. The communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface). The memory 1005 may be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0044] Optionally, the geomagnetic induction current modeling and visualization device may further include a camera, an RF (Radio Frequency) circuit, a sensor, an audio circuit, a WiFi module, etc. Sensors such as light sensors, motion sensors, and other sensors are not described in detail here.

[0045] Those skilled in the art will understand that Figure 1The terminal structure shown in the figure does not constitute a limitation on the geomagnetic induction current modeling and visualization device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0046] like Figure 1 As shown, the memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and a geomagnetic induction current modeling and visualization program.

[0047] exist Figure 1 In the geomagnetic induction current modeling and visualization device shown, the network interface 1004 is mainly used to connect to the background server and communicate data with the background server; the user interface 1003 is mainly used to connect to the client (user end) and communicate data with the client; and the processor 1001 can be used to call the geomagnetic induction current modeling and visualization program stored in the memory 1005.

[0048] In this embodiment, the geomagnetic induction current modeling and visualization device includes: a memory 1005, a processor 1001, and a geomagnetic induction current modeling and visualization program stored in the memory 1005 and executable on the processor 1001. When the processor 1001 calls the geomagnetic induction current modeling and visualization program stored in the memory 1005, the steps of the geomagnetic induction current modeling and visualization method based on the graph network in the following embodiments are executed.

[0049] The present invention also provides a method for modeling and visualizing geomagnetic induction current based on a graph network, referring to Figure 2 , Figure 2 This is a flow chart of the first embodiment of the geomagnetic induction current modeling and visualization method based on the graph network of the present invention.

[0050] In this embodiment, the method includes the following steps:

[0051] Step S101, constructing a graph network corresponding to a multi-voltage level power network;

[0052] In this embodiment, in order to realize the modeling of geomagnetic induced currents in the power network on a large scale, it is first necessary to construct a graph network corresponding to the power network with multiple voltage levels. The graph network corresponding to the power network can be constructed based on the geographic information, electrical data and transmission lines of each node in the power network. For example, the actual substation location and electrical data in the power network, as well as the connection method between the transformer and the line are read to obtain the geographic information, electrical data and transmission lines of each node. Using the graph network method, each node is regarded as an entity, and the geographic information, electrical data and transmission lines are regarded as the relevant attributes of the entity and the association between entities. Then, a semantic network can be constructed based on the entities, the relevant attributes and the association between entities, which is the graph network corresponding to the power network.

[0053] Step S102, constructing a calculation model of geomagnetic induction current in the power network;

[0054] It's important to note that direct current (DC) and alternating current (AC) have different characteristics. The magnitude and direction of AC currents vary periodically over time, with a running average value of zero over a cycle, typically forming a sinusoidal waveform. DC currents, on the other hand, exhibit no periodic variation in magnitude or direction. Geomagnetically induced currents, on the other hand, exhibit quasi-DC characteristics, with a constant direction but varying magnitude over time.

[0055] In this embodiment, after constructing a graph network corresponding to a multi-voltage level power network, a calculation model of the geomagnetic induced current in the power network can be constructed based on the quasi-DC characteristics of the geomagnetic induced current, so that the magnitude of the geomagnetic induced current in the power network can be efficiently calculated through the calculation model, and the geomagnetic induced current can be subsequently visualized.

[0056] Specifically, in order to construct a calculation model of geomagnetic induced current, it is first necessary to obtain the network admittance matrix and ground impedance matrix between each node of the power network, and also to obtain the column matrix composed of the underground geomagnetic induced current of each node. Then, based on the network admittance matrix, the ground impedance matrix and the column matrix, the calculation model is constructed. For example, due to the effect of the induced earth electric field in the power network, it can be converted into a voltage source applied to both ends of the line, so that the induced earth electric field can be used to calculate the equivalent input voltage corresponding to each node. Then, based on the equivalent input voltage and equivalent resistance corresponding to each node, the intensity of the underground geomagnetic induced current of each node is determined, and based on the intensity of the underground geomagnetic induced current, the column matrix is determined. At the same time, based on the resistivity of the conductor in the power network, the network admittance matrix and the ground impedance matrix can be determined. Finally, the LP method proposed by Lehtinen and Pirjola is used to combine the network admittance matrix, the ground impedance matrix and the column matrix to construct the calculation model.

[0057] It is understandable that after constructing the above-mentioned calculation model of geomagnetic induced current, a standard calculation model, namely a Benchmark model, can be used to test and evaluate the calculation model to determine whether it meets the model standard.

[0058] Step S103: characterize the geomagnetic induction current in the power network based on the graph network and the calculation model.

[0059] In this embodiment, after constructing a graph network corresponding to a multi-voltage level power network and a calculation model for geomagnetic induction currents in the power network, the geomagnetic induction currents in the power network can be characterized according to the graph network and the calculation model. The graph network and the calculation model can be used to visualize the power network and the geomagnetic induction currents in the power network. For example, a self-developed Python program is used, which can automatically read the substation location and electrical data of the power grid in the power network and the connection method between the transformer and the line, and then perform data calibration, display window layout and adaptive display operations, and output the topological structure diagram of the power network according to the constructed graph network. When geomagnetic induction currents appear in the power network, the current size of the geomagnetic induction current can also be automatically calculated according to the calculation model and marked in the topological structure diagram, so that the geomagnetic induction currents in the power network can be characterized according to the graph network and the calculation model, and the geomagnetic induction currents in the power network can be visualized.

[0060] In this embodiment, a graph network corresponding to a multi-voltage power grid is constructed; a computational model for geomagnetic induced currents in the power grid is constructed; and the geomagnetic induced currents in the power grid are characterized based on the graph network and the computational model. This allows for efficient modeling of geomagnetic induced currents in the power grid. The graph network is used to visualize the power grid and the magnitude of the geomagnetic induced currents, giving the power grid strong self-verification and scalability. This saves significant manpower, material, and financial resources and makes large-scale geomagnetic induced current modeling feasible.

[0061] Based on the first embodiment, a second embodiment of the geomagnetic induction current modeling and visualization method based on a graph network of the present invention is proposed. In this embodiment, step S102 includes:

[0062] Step S201, obtaining a network admittance matrix and a ground impedance matrix between nodes of the power network;

[0063] Step S202, obtaining a column matrix composed of the in-ground geomagnetic induction current of each node;

[0064] Step S203: constructing the calculation model based on the network admittance matrix, the ground impedance matrix and the column matrix.

[0065] In this embodiment, in order to construct a calculation model of geomagnetic induction current in a multi-voltage power network, it is necessary to obtain the network admittance matrix and ground impedance evidence between each node of the multi-voltage power network, and it is necessary to obtain the column matrix composed of the underground geomagnetic induction current of each node, so as to construct the calculation model based on the network admittance matrix, ground impedance evidence and column matrix.

[0066] Specifically, the changing characteristics of the geomagnetic induced current are quasi-DC characteristics. Its direction remains unchanged, but its magnitude changes periodically over time. Based on its quasi-DC characteristics, a calculation model for the geomagnetic induced current can be constructed based on the LP method. According to the LP method proposed by Lehtinen and Pirjola, the current flowing into the neutral point of the transformer in the power network can be written in the form of a matrix, namely:

[0067] I=(1+YZ) -1 J

[0068] Where 1 is the unit matrix, Y and Z are the network admittance matrix and ground impedance matrix respectively, and J is the column matrix composed of the geomagnetic induction current of each node.

[0069] Furthermore, the network admittance matrix Y and the ground impedance matrix Z can be calculated based on the conductor resistivity in the power network, and the column matrix J can be determined based on the geomagnetic induction current entering the ground at each node. The geomagnetic induction current entering the ground at each node can be calculated using the equivalent input voltage and equivalent resistance corresponding to each node. After obtaining the network admittance matrix Y, the ground impedance matrix Z, and the column matrix J, the magnitude of the geomagnetic induction current can be calculated by substituting them into the above formula.

[0070] In this embodiment, the network admittance matrix and ground impedance matrix between each node in the power network are obtained; a column matrix of the ground-entering geomagnetic induced current at each node is obtained; and a calculation model is constructed based on the network admittance matrix, the ground impedance matrix, and the column matrix. This allows for efficient calculation of the magnitude of the geomagnetic induced current in the power network based on the geomagnetic induced current calculation model, facilitating the modeling and visualization of the geomagnetic induced current in the power network graph network, saving significant manpower, material, and financial resources.

[0071] Based on the second embodiment, a third embodiment of the method for modeling and visualizing geomagnetic induced current based on a graph network of the present invention is proposed. In this embodiment, step S202 includes:

[0072] Step S301, determining the equivalent input voltage corresponding to each of the nodes based on a preset electric field;

[0073] Step S302, determining the in-ground geomagnetic induction current of each node based on the equivalent input voltage and the equivalent resistance corresponding to each node;

[0074] Step S303: determining the column matrix based on the in-ground geomagnetic induction current.

[0075] In this embodiment, the induced earth electric field can be used to obtain a column matrix composed of the underground geomagnetic induction current of each node. First, the equivalent input voltage corresponding to each node is determined according to the preset electric field, and then the underground geomagnetic induction current of each node is determined according to the equivalent input voltage and the equivalent resistance corresponding to each node, thereby determining the column matrix according to the underground geomagnetic induction current.

[0076] Specifically, according to the effect of the induced earth electric field in the power network, it can be converted into a voltage source applied to both ends of the line, so that the equivalent input voltage corresponding to the node can be calculated using the induced earth electric field. For example, the uniform earth electric field can be used as the preset electric field, and the equivalent input voltage corresponding to each node can be determined based on the uniform earth electric field and the geographical information of each node. At the same time, the equivalent resistance corresponding to each node can be obtained, and then the geomagnetic induction current of each node can be calculated. Let J i is the total current I entering the power network node i ki The sum of , then calculate J i The formula is:

[0077]

[0078] Among them, V ki is the equivalent input voltage corresponding to node i, R ki is the equivalent resistance corresponding to node i, according to J i The column matrix J of the geomagnetic induction current entering the ground at each node can be determined.

[0079] In this embodiment, the equivalent input voltage corresponding to each node is determined based on a preset electric field; the in-ground geomagnetic induced current at each node is determined based on the equivalent input voltage and the equivalent resistance corresponding to each node; and the column matrix is determined based on the in-ground geomagnetic induced current. Thus, an efficient computational model for calculating the magnitude of the geomagnetic induced current is obtained based on the column matrix, improving the accuracy of the geomagnetic induced current calculation and facilitating the modeling and visualization of the geomagnetic induced current in the graph network corresponding to the power network.

[0080] Optionally, step S301 includes:

[0081] Step S401, using a uniform electric field as the preset electric field;

[0082] Step S402: determining the equivalent input voltage based on the uniform electric field and the geographical information of each node.

[0083] In this embodiment, because the effect of the induced geoelectric field in the power network can convert it into a voltage source applied to both ends of the line, the induced geoelectric field can be used to obtain the equivalent input voltage corresponding to each node. Since there are relatively few geomagnetic stations in my country, and the geomagnetic monitoring equipment and geomagnetic monitoring data are relatively incomplete, a uniform geoelectric field can be used to replace the missing data. The uniform geoelectric field is used as the preset electric field, and the equivalent input voltage corresponding to each node is determined based on the uniform geoelectric field and the geographic information of each node. For example, the integral of the geoelectric field along the transmission line can be expressed as:

[0084]

[0085] in, represents the electric field vector of the transmission line between substation k and substation j, is the incremental segment length including direction.

[0086] If a uniform geoelectric field of 1 V / km in the east and north directions is used for analysis, only the coordinates of the line endpoints need to be considered without considering the line's tortuosity. The above formula can be expressed as:

[0087] V=E N L N +E E L E

[0088] Among them, E N and E E are the northward electric field and the eastward electric field (V / km), L N and L E are the northward distance and eastward distance (km), respectively.

[0089] In this embodiment, a uniform electric field is used as the preset electric field, and the equivalent input voltage is determined based on the uniform electric field and the geographic information of each node. This allows accurate acquisition of the equivalent input voltage at each node, facilitating the subsequent establishment of a calculation model for geomagnetic induced current, thereby enabling modeling and visualization of geomagnetic induced current.

[0090] Based on the second embodiment, a fourth embodiment of the method for modeling and visualizing geomagnetic induced current based on a graph network of the present invention is proposed. In this embodiment, step S201 includes:

[0091] Step S501, determining the conductor resistivity of the power network based on the equivalent resistance corresponding to each of the nodes;

[0092] Step S502: determining the network admittance matrix and the ground impedance matrix based on the conductor resistivity.

[0093] In this embodiment, the conductor resistivity of the power network can be determined based on the equivalent resistance corresponding to each node, and then the network admittance matrix and the reception impedance matrix can be determined based on the conductor resistivity. For example, the formula of the network admittance matrix can be expressed as:

[0094]

[0095] Among them, R ij and R ik Represents the equivalent resistance between two nodes.

[0096] Since the network admittance matrix and the ground impedance matrix are inverse matrices of each other, after obtaining the network admittance matrix, the ground impedance matrix can be obtained according to the network admittance matrix.

[0097] In this embodiment, the conductor resistivity of the power network is determined based on the equivalent resistance corresponding to each node; and the network admittance matrix and the ground impedance matrix are determined based on the conductor resistivity. This allows the network admittance matrix and the ground impedance matrix to be used as part of a computational model, facilitating the subsequent development of a computational model for geomagnetic induced currents and enabling modeling and visualization of geomagnetic induced currents.

[0098] Based on the first embodiment, a fifth embodiment of the method for modeling and visualizing geomagnetic induced current based on a graph network of the present invention is proposed. In this embodiment, step S101 includes:

[0099] Step S601, obtaining geographic information, electrical data, and transmission lines of each node in the power network;

[0100] Step S602: construct the graph network based on the geographic information, the electrical data, and the transmission lines.

[0101] In this embodiment, the geographic information, electrical data and transmission lines of each node in the power network are obtained, and a map network corresponding to the multi-voltage level power network can be constructed based on the geographic information, electrical data and transmission lines.

[0102] Specifically, we independently developed a Python program that can automatically read the actual substation location and electrical data in the power network, as well as the connection method between transformers and lines. After data processing, we determine each node and obtain the geographic information, electrical data and transmission lines of each node. Then, we use the graph network method to construct a graph network corresponding to the power network based on the geographic information, electrical data and transmission lines of each node. This graph network can output and present the topological structure diagram of the power network.

[0103] In this embodiment, the graph network is constructed by acquiring geographic information, electrical data, and transmission lines for each node in the power network. Using the graph network approach, a multi-voltage power network is characterized and a topological diagram of the power network is presented, which facilitates modeling and visualization of geomagnetic induced currents in the power network.

[0104] Based on the first embodiment, a sixth embodiment of the method for modeling and visualizing geomagnetic induced current based on a graph network of the present invention is proposed. In this embodiment, step S103 includes:

[0105] Step S701, when geomagnetic induction current is generated in the power network, obtaining current data based on the calculation model;

[0106] Step S702 : Characterize the current data based on the graph network for visualization.

[0107] In this embodiment, after constructing a graph network corresponding to a multi-voltage level power network and a calculation model for geomagnetic induction current in the power network, the geomagnetic induction current in the power network can be characterized according to the graph network and the calculation model. When a geomagnetic induction current is generated in the power network, current data is obtained according to the calculation model, and the current data is characterized according to the graph network for visualization. For example, after constructing the graph network, a topological structure diagram corresponding to the power network or other diagrams that can represent the power network can be output according to the graph network. Then, when a geomagnetic induction current is generated in the power network, the current magnitude of the geomagnetic induction current can be automatically calculated according to the calculation model and shown in the diagram, thereby realizing visualization of the geomagnetic induction current, and intuitively determining the geomagnetic induction current in the power network and performing data analysis.

[0108] In this embodiment, when geomagnetically induced currents are generated in the power network, current data is obtained based on the computational model; this current data is then represented and visualized based on the graph network. By combining the graph network and computational model, multi-voltage power networks and the geomagnetically induced currents therein are modeled and visualized. This allows for efficient determination of the magnitude and location of geomagnetically induced currents in the power network during geomagnetic storms, saving significant manpower, material, and financial resources.

[0109] Based on the above embodiments, a seventh embodiment of the method for modeling and visualizing geomagnetic induced current based on a graph network of the present invention is proposed. In this embodiment, after step S101, the method further includes:

[0110] Step S801, monitoring whether there is a new node in the power network;

[0111] Step S802: If the newly added node exists, obtain the node parameters corresponding to the newly added node;

[0112] Step S803: Update the graph network based on the node parameters.

[0113] In this embodiment, after constructing a graph network corresponding to a multi-voltage level power network, it is possible to continuously monitor whether there are new nodes in the power network. If there are new nodes, the node parameters corresponding to the new nodes are obtained, and the graph network is updated according to the node parameters.

[0114] Specifically, the nodes in the power network are not static. New nodes may be added as the country develops. When a new node is detected, the node parameters corresponding to the new node can be obtained, such as geographic information, electrical data, and transmission lines. Based on the node parameters, the graph network can be automatically updated to obtain an updated graph network corresponding to the power network.

[0115] In this embodiment, the power network is monitored for newly added nodes; if so, node parameters corresponding to the newly added nodes are obtained; and the graph network is updated based on the node parameters. This not only enables modeling and visualization of the power network and the geomagnetic induced currents therein, but also enables automatic model updates, improving the intelligence and accuracy of the modeling and visualization.

[0116] In addition, the embodiment of the present invention also proposes a geomagnetic induction current modeling and visualization device, referring to Figure 3 , the geomagnetic induced current modeling and visualization device comprises:

[0117] The first building module is used to build a graph network corresponding to a multi-voltage level power network;

[0118] A second building module is used to build a calculation model of geomagnetic induced current in the power network;

[0119] A characterization module is used to characterize the geomagnetic induced current in the power network based on the graph network and the calculation model.

[0120] The method performed by the above-mentioned geomagnetic induction current modeling and visualization device can refer to the various embodiments of the geomagnetic induction current modeling and visualization method of the present invention, and will not be repeated here.

[0121] In addition, an embodiment of the present invention also proposes a geomagnetic induction current modeling and visualization device, which includes: a memory, a processor, and a geomagnetic induction current modeling and visualization program stored in the memory and executable on the processor. When the geomagnetic induction current modeling and visualization program is executed by the processor, the steps of the geomagnetic induction current modeling and visualization method described above are implemented.

[0122] In addition, an embodiment of the present invention also proposes a computer-readable storage medium, on which a geomagnetic induction current modeling and visualization program is stored. When the geomagnetic induction current modeling and visualization program is executed by a processor, the steps of the geomagnetic induction current modeling and visualization method described above are implemented.

[0123] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or system comprising the element.

[0124] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0125] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0126] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for modeling and visualizing geomagnetic induced current based on a graph network, characterized in that: The geomagnetic induced current modeling and visualization method comprises: Construct a graph network corresponding to a multi-voltage power network; Constructing a calculation model of geomagnetic induced current in the power network; Characterizing the geomagnetic induced current in the power network based on the graph network and the calculation model; After the step of constructing a graph network corresponding to a multi-voltage level power network, the method further includes: Monitoring whether there is a new node in the power network; if there is a new node, obtaining node parameters corresponding to the new node; and updating the graph network based on the node parameters; The step of constructing a calculation model of geomagnetic induction current in the power network includes: Obtaining a network admittance matrix and a ground impedance matrix between each node of the power network; obtaining a column matrix composed of the ground magnetic induction current of each node; and constructing the calculation model based on the network admittance matrix, the ground impedance matrix, and the column matrix; The step of characterizing the geomagnetic induced current in the power network based on the graph network and the calculation model includes: When geomagnetic induction current is generated in the power network, current data is obtained based on the calculation model; and the current data is represented based on the graph network for visualization.

2. The geomagnetic induction current modeling and visualization method according to claim 1, characterized in that: The step of obtaining a column matrix composed of the in-ground geomagnetic induction currents of each node comprises: Determining the equivalent input voltage corresponding to each of the nodes based on a preset electric field; determining, based on the equivalent input voltage and the equivalent resistance corresponding to each of the nodes, an in-ground geomagnetic induction current of each of the nodes; The column matrix is determined based on the in-ground geomagnetic induction current.

3. The geomagnetic induction current modeling and visualization method according to claim 2, characterized in that: The step of determining the equivalent input voltage corresponding to each of the nodes based on the preset electric field includes: Using a uniform electric field as the preset electric field; The equivalent input voltage is determined based on the uniform electric field and the geographical information of each of the nodes.

4. The geomagnetic induction current modeling and visualization method according to claim 1, characterized in that: The step of obtaining a network admittance matrix and a ground impedance matrix between nodes of the power network includes: determining the conductor resistivity of the power network based on the equivalent resistance corresponding to each of the nodes; The network admittance matrix and the ground impedance matrix are determined based on the conductor resistivity.

5. The geomagnetic induction current modeling and visualization method according to claim 1, wherein: The step of constructing a graph network corresponding to a multi-voltage level power network includes: Obtaining geographic information, electrical data, and transmission lines of each node in the power network; The map network is constructed based on the geographic information, the electrical data and the transmission lines.

6. A geomagnetic induction current modeling and visualization device, characterized in that: The geomagnetic induction current modeling and visualization device includes: a memory, a processor, and a geomagnetic induction current modeling and visualization program stored in the memory and executable on the processor. When the geomagnetic induction current modeling and visualization program is executed by the processor, the steps of the geomagnetic induction current modeling and visualization method according to any one of claims 1 to 5 are implemented.

7. A computer-readable storage medium, characterized in that The readable storage medium stores a geomagnetic induction current modeling and visualization program, which, when executed by a processor, implements the steps of the geomagnetic induction current modeling and visualization method according to any one of claims 1 to 5.

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