Method and device for identifying sheath induced voltage of multi-loop parallel cable line

Abstract

The invention relates to a sheath induced voltage identification method and device for a multi-loop parallel cable line. The method comprises the following steps: acquiring line structure data and current current sensing data of a multi-loop parallel cable line, and constructing a cable calculation model of the multi-loop parallel cable based on the line structure data so as to identify a sheath induced voltage matrix of the multi-loop parallel cable line, and splitting the sheath induced voltage matrix into a plurality of sub induced voltage matrixes, the matrix characteristic information of the sheath induced voltage matrix is identified; based on the line structure model and the matrix characteristic information of the multi-loop parallel cable line, adjusting to obtain a target sheath induced voltage matrix; and calculating a target sheath induced voltage value of the multi-loop parallel cable line through a cable calculation model containing the target sheath induced voltage matrix based on the current current sensing data. By adopting the method, the efficiency of calculating the induced voltage of the multi-loop parallel cable sheath can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of sheath induced voltage identification of multi-circuit parallel cables, and in particular to a sheath induced voltage identification method and device for multi-circuit parallel cable lines. Background Art

[0002] With the growth of urban load demand, parallel cables are becoming more and more popular. At present, there are many problems with multiple parallel cables with the same phase, such as uneven current distribution and large sheath circulating current. Therefore, in order to ensure the stable operation of the power system, it is particularly important to study the sheath induced voltage of multi-circuit parallel cables. The research focus of the sheath induced voltage of multi-circuit parallel cables is on the calculation of the sheath induced voltage of multi-circuit parallel cables. Due to factors such as the complex structure of the cable system and the diverse changes in electromagnetic parameters, the calculation process may require a lot of computing resources and time, resulting in high calculation costs. The electromagnetic field distribution in the multi-circuit parallel cable system is more complex. The calculation method needs to consider the mutual influence between different cables and the mutual coupling of the sheath induced voltage, resulting in high calculation complexity. Therefore, how to improve the efficiency of calculating the sheath induced voltage of multi-circuit parallel cables is the current research focus.

[0003] The traditional calculation of the induced voltage of the sheath of multi-circuit parallel cables lacks efficient algorithms and computing techniques when dealing with large-scale and complex electromagnetic field problems, resulting in slow calculation speed. In addition, the algorithm cannot meet the needs of real-time calculation, especially in application scenarios that require fast response and real-time monitoring. The problem of insufficient calculation speed leads to low efficiency in calculating the induced voltage of the sheath of multi-circuit parallel cables. Summary of the invention

[0004] Based on this, it is necessary to provide a method, device, computer equipment, computer-readable storage medium and computer program product for identifying the sheath induced voltage of a multi-circuit parallel cable line in response to the above-mentioned technical problems.

[0005] In a first aspect, the present application provides a method for identifying sheath induced voltage of a multi-circuit parallel cable line, comprising:

[0006] Acquire line structure data of a multi-loop parallel cable line and current current sensing data of the multi-loop parallel cable line, and construct a cable calculation model of the multi-loop parallel cable based on the line structure data;

[0007] Based on the cable calculation model, identifying the sheath induced voltage matrix of the multi-loop parallel cable line, and splitting the sheath induced voltage matrix into a plurality of sub-induced voltage matrices through a block matrix strategy;

[0008] Based on each of the sub-induced voltage matrices, the matrix characteristic information of the sheath induced voltage matrix is ​​identified, and based on the line structure model of the multi-loop parallel cable line and the matrix characteristic information of the sheath induced voltage matrix, the sheath induced voltage matrix is ​​adjusted to obtain a target sheath induced voltage matrix;

[0009] Based on the current current sensing data, a target sheath induced voltage value of the multi-loop parallel cable line is calculated through a cable calculation model including the target sheath induced voltage matrix.

[0010] Optionally, constructing a cable calculation model of the multi-loop parallel cable based on the line structure data includes:

[0011] Acquire a cable calculation model template, and based on the line structure data, identify each cable structure of the multi-loop parallel cable and relative association information between each cable structure;

[0012] Based on the relative correlation information between the cable structures, the structural parameters of the cable structures are generated. Based on the structural parameters, the cable calculation model template is optimized to obtain the cable calculation model of the multi-loop parallel cable.

[0013] Optionally, the identifying the sheath induced voltage matrix of the multi-loop parallel cable line based on the cable calculation model includes:

[0014] Based on the cable calculation model, an algorithm for identifying the sheath induced voltage of the multi-loop parallel cable line;

[0015] The sheath induced voltage algorithm is matrix processed to obtain the sheath induced voltage matrix of the multi-loop parallel cable line.

[0016] Optionally, the shield induced voltage matrix is ​​split into a plurality of sub-induced voltage matrices by using a block matrix strategy, including:

[0017] Acquire current computing memory and current computing power, and query the number of matrices to be computed simultaneously in a computing database based on the current computing memory and the current computing power;

[0018] Based on the number of matrices, the sheath induced voltage matrix is ​​subjected to matrix splitting processing through a block matrix strategy to obtain sub-induced voltage matrices.

[0019] Optionally, the identifying matrix characteristic information of the sheath induced voltage matrix based on each of the sub-induced voltage matrices includes:

[0020] Acquire a line cross-sectional structure of the multi-loop parallel cable line, and perform grid division processing on the line cross-sectional structure of the multi-loop parallel cable line to obtain each grid area;

[0021] Identify the sub-induced voltage matrix corresponding to each grid area, and based on the area size of the grid area corresponding to each sub-induced voltage matrix, solve the sub-induced voltage matrix by a conjugate gradient algorithm to obtain a matrix solution of the sub-induced voltage matrix;

[0022] Based on the matrix solutions of the sub-induced voltage matrices and the position information of the grid areas corresponding to the sub-induced voltage matrices in the line cross-sectional structure, the matrix characteristic information of the sheath induced voltage matrix is ​​identified.

[0023] Optionally, adjusting the sheath induced voltage matrix based on the line structure model of the multi-loop parallel cable line and the matrix characteristic information of the sheath induced voltage matrix to obtain a target sheath induced voltage matrix includes:

[0024] Acquire simulation parameters and actual sheath induced voltage values ​​corresponding to the simulation parameters, and based on the simulation parameters, simulate the current transmission process through the line structure model to obtain simulated sheath voltage data of the multi-loop parallel cable line, and based on the simulated sheath voltage data, calculate the simulated sheath induced voltage value of the multi-loop parallel cable line through a cable calculation model including the sheath induced voltage matrix;

[0025] Based on the difference between the actual sheath induced voltage value and the simulated sheath induced voltage value, the sheath induced voltage matrix is ​​adjusted to obtain a target sheath induced voltage matrix.

[0026] In a second aspect, the present application also provides a sheath induced voltage identification device for a multi-circuit parallel cable line, comprising:

[0027] An acquisition module, used to acquire line structure data of a multi-loop parallel cable line and current current sensing data of the multi-loop parallel cable line, and to construct a cable calculation model of the multi-loop parallel cable based on the line structure data;

[0028] A splitting module is used to identify the sheath induced voltage matrix of the multi-loop parallel cable line based on the cable calculation model, and split the sheath induced voltage matrix into multiple sub-induced voltage matrices through a block matrix strategy;

[0029] An adjustment module is used to identify the matrix characteristic information of the sheath induced voltage matrix based on each of the sub-induced voltage matrices, and adjust the sheath induced voltage matrix based on the line structure model of the multi-loop parallel cable line and the matrix characteristic information of the sheath induced voltage matrix to obtain a target sheath induced voltage matrix;

[0030] A calculation module is used to calculate the target sheath induced voltage value of the multi-loop parallel cable line based on the current current sensing data through a cable calculation model including the target sheath induced voltage matrix.

[0031] Optionally, the acquisition module is specifically used to:

[0032] Acquire a cable calculation model template, and based on the line structure data, identify each cable structure of the multi-loop parallel cable and relative association information between each cable structure;

[0033] Based on the relative correlation information between the cable structures, the structural parameters of the cable structures are generated. Based on the structural parameters, the cable calculation model template is optimized to obtain the cable calculation model of the multi-loop parallel cable.

[0034] Optionally, the splitting module is specifically used to:

[0035] Based on the cable calculation model, an algorithm for identifying the sheath induced voltage of the multi-loop parallel cable line;

[0036] The sheath induced voltage algorithm is matrix processed to obtain the sheath induced voltage matrix of the multi-loop parallel cable line.

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

[0038] Acquire current computing memory and current computing power, and query the number of matrices to be computed simultaneously in a computing database based on the current computing memory and the current computing power;

[0039] Based on the number of matrices, the sheath induced voltage matrix is ​​subjected to matrix splitting processing through a block matrix strategy to obtain sub-induced voltage matrices.

[0040] Optionally, the adjustment module is specifically used to:

[0041] Acquire a line cross-sectional structure of the multi-loop parallel cable line, and perform grid division processing on the line cross-sectional structure of the multi-loop parallel cable line to obtain each grid area;

[0042] Identify the sub-induced voltage matrix corresponding to each grid area, and based on the area size of the grid area corresponding to each sub-induced voltage matrix, solve the sub-induced voltage matrix by a conjugate gradient algorithm to obtain a matrix solution of the sub-induced voltage matrix;

[0043] Based on the matrix solutions of the sub-induced voltage matrices and the position information of the grid areas corresponding to the sub-induced voltage matrices in the line cross-sectional structure, the matrix characteristic information of the sheath induced voltage matrix is ​​identified.

[0044] Optionally, the adjustment module is specifically used to:

[0045] Acquire simulation parameters and actual sheath induced voltage values ​​corresponding to the simulation parameters, and based on the simulation parameters, simulate the current transmission process through the line structure model to obtain simulated sheath voltage data of the multi-loop parallel cable line, and based on the simulated sheath voltage data, calculate the simulated sheath induced voltage value of the multi-loop parallel cable line through a cable calculation model including the sheath induced voltage matrix;

[0046] Based on the difference between the actual sheath induced voltage value and the simulated sheath induced voltage value, the sheath induced voltage matrix is ​​adjusted to obtain a target sheath induced voltage matrix.

[0047] In a third aspect, the present application provides a computer device, wherein the computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of any one of the methods in the first aspect are implemented.

[0048] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of any one of the methods in the first aspect are implemented.

[0049] In a fifth aspect, the present application provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the steps of any one of the methods in the first aspect are implemented.

[0050] The above-mentioned sheath induced voltage identification method and device for a multi-loop parallel cable line obtains the line structure data of the multi-loop parallel cable line and the current current sensing data of the multi-loop parallel cable line, and constructs a cable calculation model of the multi-loop parallel cable based on the line structure data; identifies the sheath induced voltage matrix of the multi-loop parallel cable line based on the cable calculation model, and splits the sheath induced voltage matrix into multiple sub-induced voltage matrices through a block matrix strategy; identifies the matrix characteristic information of the sheath induced voltage matrix based on each of the sub-induced voltage matrices, and adjusts the sheath induced voltage matrix based on the line structure model of the multi-loop parallel cable line and the matrix characteristic information of the sheath induced voltage matrix to obtain a target sheath induced voltage matrix; calculates the target sheath induced voltage value of the multi-loop parallel cable line through a cable calculation model including the target sheath induced voltage matrix based on the current current sensing data. This solution constructs a cable calculation model for multi-circuit parallel cables, identifies the sheath induced voltage matrix of the multi-circuit parallel cable line, and then identifies the matrix characteristic information of the sheath induced voltage matrix by splitting the matrix to adjust the sheath induced voltage matrix, thereby improving the accuracy of the obtained sheath induced voltage matrix and the comprehensiveness of the analysis of multi-circuit parallel. Finally, this solution calculates the sheath induced voltage through the adjusted calculation model of the multi-circuit parallel line, improves the accuracy of the calculation, and can calculate the sheath induced voltage in real time based on the calculation model, thereby improving the efficiency of calculating the sheath induced voltage of the multi-circuit parallel cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Figure 1 It is a schematic flow chart of a method for identifying sheath induced voltage of a multi-circuit parallel cable line in one embodiment;

[0053] Figure 2 A schematic diagram of the distance between the metal sheath of a single-circuit cable and the cable cores of each phase in an embodiment;

[0054] Figure 3 A schematic diagram of the distance between the metal sheath of a double-circuit cable and the cable cores of each phase in one embodiment;

[0055] Figure 4 A schematic diagram of a flow chart of an example of identifying the sheath induced voltage of a multi-circuit parallel cable line in one embodiment;

[0056] Figure 5 It is a structural block diagram of a sheath induced voltage identification device for a multi-loop parallel cable line in one embodiment;

[0057] Figure 6 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0059] The sheath induced voltage identification method of a multi-loop parallel cable line provided in an embodiment of the present application can be applied to the application environment of the sheath induced voltage identification of a multi-loop parallel cable line. The method can be applied to a terminal, a server, or a system including a terminal and a server, and is implemented through the interaction between the terminal and the server. Among them, the terminal can be, but is not limited to, various personal computers, laptops, smart phones, tablet computers, etc. Among them, the terminal identifies the sheath induced voltage matrix of the multi-loop parallel cable line by constructing a cable calculation model of the multi-loop parallel cable, and then identifies the matrix characteristic information of the sheath induced voltage matrix by splitting the matrix to adjust the sheath induced voltage matrix, thereby improving the accuracy of the obtained sheath induced voltage matrix and the comprehensiveness of the analysis of the multi-loop parallel connection. Finally, this scheme calculates the sheath induced voltage through the adjusted calculation model of the multi-loop parallel line, improves the accuracy of the calculation, and can calculate the sheath induced voltage in real time based on the calculation model, thereby improving the efficiency of calculating the sheath induced voltage of the multi-loop parallel cable.

[0060] In an exemplary embodiment, Figure 2 As shown, a method for identifying the sheath induced voltage of a multi-circuit parallel cable line is provided, and the method is applied to a terminal as an example for explanation, including the following steps S101 to S104. Among them:

[0061] S101, acquiring line structure data of a multi-loop parallel cable line and current current sensing data of the multi-loop parallel cable line, and constructing a cable calculation model of the multi-loop parallel cable based on the line structure data.

[0062] In this embodiment, the terminal obtains the line structure data of the multi-loop parallel cable line in response to the data upload operation of the staff. The line structure data includes but is not limited to the cable structure data of each phase of the multi-loop parallel cable line, and the cable structure data includes the phase cable core structure data and the sheath structure data. Then, the terminal collects the current current sensing data of the multi-loop parallel cable line in real time. After that, the terminal constructs the cable calculation model of the multi-loop parallel cable based on the acquired line structure data. The specific construction process will be described in detail later.

[0063] S102, based on the cable calculation model, identifying the sheath induced voltage matrix of the multi-loop parallel cable line, and splitting the sheath induced voltage matrix into multiple sub-induced voltage matrices through a block matrix strategy.

[0064] In this embodiment, the terminal identifies the sheath induced voltage matrix of the multi-loop parallel cable line based on the cable calculation model, and splits the sheath induced voltage matrix into multiple sub-induced voltage matrices through a block matrix strategy. Among them, the block matrix strategy is a splitting strategy for equally splitting the sheath induced voltage matrix, and the specific splitting process will be described in detail later.

[0065] S103, based on each sub-induced voltage matrix, identifying the matrix characteristic information of the sheath induced voltage matrix, and based on the line structure model of the multi-loop parallel cable line and the matrix characteristic information of the sheath induced voltage matrix, adjusting the sheath induced voltage matrix to obtain a target sheath induced voltage matrix.

[0066] In this embodiment, the terminal identifies the matrix characteristic information of the sheath induced voltage matrix based on each sub-induced voltage matrix. The matrix characteristic information is the distribution characteristic of the sheath induced voltage matrix in the sheath of the multi-circuit parallel cable. Then, the terminal adjusts the sheath induced voltage matrix based on the line structure model of the multi-circuit parallel cable line and the matrix characteristic information of the sheath induced voltage matrix to obtain the target sheath induced voltage matrix. The specific adjustment process will be described in detail later.

[0067] S104, based on the current current sensing data, a target sheath induced voltage value of the multi-loop parallel cable line is calculated by a cable calculation model including a target sheath induced voltage matrix.

[0068] In this embodiment, the terminal calculates the target sheath induced voltage value of the multi-loop parallel cable line based on the current current sensing data through a cable calculation model including a target sheath induced voltage matrix.

[0069] Specifically, the terminal is based on the relevant parameters of the cable, such as conductor material, diameter, winding method, conductor arrangement and other information. Then, a mathematical model of the cable is established based on these parameters, and the sheath induced voltage is calculated in combination with the theory and sensor installation position. Finally, the terminal collects the data of the current sensor in real time and calculates the sheath induced voltage in real time in combination with the pre-set calculation algorithm.

[0070] Based on the above scheme, by constructing a cable calculation model for multi-circuit parallel cables, the sheath induced voltage matrix of the multi-circuit parallel cable line is identified, and then, by splitting the matrix, the matrix characteristic information of the sheath induced voltage matrix is ​​identified to adjust the sheath induced voltage matrix, thereby improving the accuracy of the obtained sheath induced voltage matrix and the comprehensiveness of the analysis of multi-circuit parallel. Finally, this scheme calculates the sheath induced voltage through the adjusted calculation model of the multi-circuit parallel line, improves the accuracy of the calculation, and can calculate the sheath induced voltage in real time based on the calculation model, thereby improving the efficiency of calculating the sheath induced voltage of the multi-circuit parallel cable.

[0071] Optionally, based on the line structure data, a cable calculation model for multi-loop parallel cables is constructed, including: obtaining a cable calculation model template, and based on the line structure data, identifying each cable structure of the multi-loop parallel cable and the relative correlation information between each cable structure; based on the relative correlation information between each cable structure, generating structural parameters of each cable structure, and based on each structural parameter, optimizing the cable calculation model template to obtain the cable calculation model of the multi-loop parallel cable.

[0072] In this embodiment, the terminal obtains a cable calculation model template, and identifies each cable structure of a multi-loop parallel cable and relative association information between each cable structure based on line structure data.

[0073] Then, the terminal generates structural parameters of each cable structure based on the relative correlation information between the cable structures, optimizes the cable calculation model template based on the structural parameters, and obtains the cable calculation model of the multi-loop parallel cable.

[0074] Specifically, a theoretical calculation model is proposed based on the actual situation of the line and cable. The existing calculation model is as follows: The distance between the metal sheath of a single-core cable and the cable core of each phase is as follows: Figure 1 , the magnetic flux generated by the A phase cable core current between the A phase cable core and the sheath P is:

[0075]

[0076] GMR S is the geometric mean radius of the sheath P. Phases B and C follow the same rule, so the total magnetic flux generated on the sheath P is:

[0077]

[0078] like Figure 2 As shown in the figure, when the sheath P is concentric with the A-phase cable core, P can be regarded as the metal sheath of the A-phase cable. The magnetic flux can be simplified as:

[0079]

[0080] In the case of three-phase cable core current balance, the above formula can be transformed into:

[0081]

[0082] According to Faraday's electromagnetic induction principle, the induced voltage generated by the A, B, and C three-phase cable core currents on the A phase sheath is:

[0083]

[0084] When the cable is powered by two circuits, the metal sheath is not only subject to the induced voltage generated by the cable core of the circuit, but also the induced voltage generated by the cable core current in the adjacent circuit. Therefore, the calculation formula derived for the single circuit case is no longer applicable. Therefore, the sheath induced voltage in the case of double circuit power supply is derived and calculated. Usually, the cable model for double circuit power supply is the same. Figure 3 The proportional representation between the phase distances shown, the magnetic flux increased by the cable core current in the adjacent loop in the metal sheath of phase A is:

[0085]

[0086] Assuming that the currents in the cores of the double-circuit cables are of the same magnitude and phase, the above formula can be simplified to:

[0087]

[0088] The induced voltage added by another circuit to the metal sheath of phase A cable is:

[0089]

[0090] The induced voltage of this circuit: After superposition, the calculation formula for the induced voltage generated by the cable core current on the metal sheath of phase A of the double-circuit cable is:

[0091]

[0092] Based on the above scheme, the calculation model of multi-directional parallel cables is analyzed by analyzing the calculation model based on the single-phase cable, which improves the comprehensiveness and accuracy of identification.

[0093] Optionally, based on the cable calculation model, the sheath induced voltage matrix of the multi-loop parallel cable line is identified, including: based on the cable calculation model, identifying the sheath induced voltage algorithm of the multi-loop parallel cable line; and matrixing the sheath induced voltage algorithm to obtain the sheath induced voltage matrix of the multi-loop parallel cable line.

[0094] In this embodiment, the terminal identifies the sheath induced voltage algorithm of the multi-loop parallel cable line based on the cable calculation model. Then, the terminal performs matrix processing on the sheath induced voltage algorithm to obtain the sheath induced voltage matrix of the multi-loop parallel cable line. Specifically, in the actual operation process, the three-phase cable core current is often not completely balanced. At this time, the calculation model will be more complicated, and when the number of loops increases, the distance relationship of the model will increase exponentially. Regardless of how the number of model loops increases, the induced voltage can be expressed as a matrix relationship:

[0095]

[0096] Based on the above scheme, by combining the characteristics of multi-directional cables, the induced voltage of each phase cable is represented by a matrix, which improves the efficiency and accuracy of identifying the sheath induced voltage of multi-directional parallel cables.

[0097] Optionally, the sheath induced voltage matrix is ​​split into multiple sub-induced voltage matrices through a block matrix strategy, including: obtaining the current computing memory and the current computing power, and based on the current computing memory and the current computing power, querying the number of matrices that are simultaneously operated in the computing database; based on the number of matrices, the sheath induced voltage matrix is ​​subjected to matrix splitting processing through a block matrix strategy to obtain each sub-induced voltage matrix.

[0098] In this embodiment, the terminal obtains the current operation memory and the current operation power, and based on the current operation memory and the current operation power, queries the number of matrices operated simultaneously in the operation database. The current operation power is the hardware configuration information used to calculate the sheath induced voltage. Different hardware configuration information corresponds to different numbers of simultaneous operators of the induced voltage matrices, and the corresponding relationship is preset in the terminal.

[0099] Then, based on the number of matrices, the terminal splits the sheath induced voltage matrix through a block matrix strategy to obtain each sub-induced voltage matrix. Specifically, the terminal rearranges and stores the large matrix in blocks, and each sub-matrix contains continuous rows and columns. Then, the required calculation operations (such as matrix multiplication, inverse matrix calculation, etc.) are performed on each sub-matrix respectively. Multiple sub-matrices can be processed in parallel using multi-threading or multi-processing to increase the calculation speed. During the calculation process, it is necessary to process the boundary conditions between the sub-matrices, and synchronize the data after the calculation of each sub-matrix is ​​completed. Finally, the terminal reassembles the processed sub-matrices into a complete large matrix, processes the errors between the boundaries, and performs global adjustments to correct the errors introduced by independent calculations.

[0100] Based on the above scheme, by splitting the matrix based on the current computing memory and computing power, while ensuring the computing efficiency of each sub-matrix after splitting, it ensures that each sub-matrix after splitting can operate normally.

[0101] Optionally, based on each sub-induced voltage matrix, matrix characteristic information of the sheath induced voltage matrix is ​​identified, including: obtaining a line profile structure of a multi-loop parallel cable line, and performing grid division processing on the line profile structure of the multi-loop parallel cable line to obtain each grid area; identifying a sub-induced voltage matrix corresponding to each grid area, and based on the area size of the grid area corresponding to each sub-induced voltage matrix, solving the sub-induced voltage matrix through a conjugate gradient algorithm to obtain a matrix solution of the sub-induced voltage matrix; based on the matrix solutions of each sub-induced voltage matrix and the position information of the grid area corresponding to each sub-induced voltage matrix in the line profile structure, the matrix characteristic information of the sheath induced voltage matrix is ​​identified.

[0102] In this embodiment, the terminal obtains the line profile structure of the multi-loop parallel cable line, and performs grid division processing on the line profile structure of the multi-loop parallel cable line to obtain each grid area. Among them, the grid division processing method can perform structural division processing on the sheath part of the line profile structure through a finite element simulation model. Identify the sub-induced voltage matrix corresponding to each grid area, and based on the area size of the grid area corresponding to each sub-induced voltage matrix, solve the sub-induced voltage matrix through the conjugate gradient algorithm to obtain a matrix solution of the sub-induced voltage matrix. Among them, since the sub-matrix of the refined grid is small and requires high-precision calculation, it may require more computing resources and time, while the sub-matrix of the coarse grid is relatively fast. Because the computing power and memory allocated to the sub-matrix corresponding to different grids are different.

[0103] The calculation process of each sub-induced voltage matrix is ​​as follows:

[0104] First, an initial solution vector is initialized, and the corresponding residual vector and search direction vector are calculated. Then, in each iteration, the step size factor is calculated and the solution vector and residual vector are updated.

[0105] Next, a new search direction vector is calculated based on the new residual vector. The iterative process is repeated until the preset convergence condition is met, such as the norm of the residual vector is less than a certain threshold. Through this step-by-step approximation method, the conjugate gradient method can effectively solve large-scale low-order matrix problems within a relatively small number of iterations, and is suitable for solving symmetric positive definite matrices.

[0106] After all sub-matrices are calculated, data synchronization is performed. Special attention should be paid to the junction of the fine grid and the coarse grid area, and data smoothing should be performed through interpolation or other methods to eliminate the errors caused by different grid scales.

[0107] Reassemble the processed sub-matrices into a complete large matrix. Perform global adjustments and corrections to ensure the accuracy and consistency of the overall calculation results. In particular, special processing may be required in the grid transition area to reduce errors.

[0108] After completing the reorganization and correction of the large matrix, post-processing and analysis are performed to verify the accuracy and stability of the calculation results and ensure the effectiveness of the grid refinement and coarsening strategies for the calculation objectives.

[0109] Finally, the terminal identifies the matrix characteristic information of the sheath induced voltage matrix based on the matrix solutions of the sub-induced voltage matrices and the position information of the grid areas corresponding to the sub-induced voltage matrices in the line profile structure.

[0110] Based on the above scheme, multi-matrix and multi-grid splitting and identification are performed to analyze the matrix characteristic information of the sheath induced voltage matrix, thereby improving the comprehensiveness and accuracy of the analysis.

[0111] Optionally, based on the line structure model of the multi-circuit parallel cable line and the matrix characteristic information of the sheath induced voltage matrix, the sheath induced voltage matrix is ​​adjusted to obtain a target sheath induced voltage matrix, including: obtaining simulation parameters and actual sheath induced voltage values ​​corresponding to the simulation parameters, and based on the simulation parameters, simulating the current transmission process through the line structure model to obtain simulated sheath voltage data of the multi-circuit parallel cable line, and based on the simulated sheath voltage data, calculating the simulated sheath induced voltage values ​​of the multi-circuit parallel cable line through a cable calculation model including the sheath induced voltage matrix; based on the actual sheath induced voltage value and the difference between the simulated sheath induced voltage value, adjusting the sheath induced voltage matrix to obtain the target sheath induced voltage matrix.

[0112] In this embodiment, the terminal obtains simulation parameters and actual sheath induced voltage values ​​corresponding to the simulation parameters, and based on the simulation parameters, simulates the current transmission process through the line structure model to obtain simulated sheath voltage data of multi-loop parallel cable lines, and based on the simulated sheath voltage data, calculates the simulated sheath induced voltage values ​​of the multi-loop parallel cable lines through a cable calculation model including a sheath induced voltage matrix. Finally, the terminal adjusts the sheath induced voltage matrix based on the difference between the actual sheath induced voltage value and the simulated sheath induced voltage value to obtain a target sheath induced voltage matrix.

[0113] Specifically, the terminal determines the key parameters (i.e., simulation parameters) such as the sheath material, size, and geometry in the experimental scenario, and selects appropriate simulation tools (such as finite element software) for modeling. Next, the terminal sets simulation parameters such as frequency, electromagnetic field strength, etc., and simulates and solves the sheath induced voltage. After obtaining the simulation results, the proposed calculation results are compared with the numerical calculation method to evaluate the error range. Among them, if the simulation results and the calculation results of the proposed method are within the allowable error range, it means that the proposed method meets the requirements and the subsequent actual calculation process can be carried out. If the error exceeds the range, it is necessary to review the experimental parameters and calculation methods, and it may be necessary to adjust or optimize the matrix division to make the calculation results more accurate. Finally, through repeated experiments and verifications of the above steps, the terminal can gradually improve the calculation model and method to ensure that it meets the actual requirements and has high computing performance.

[0114] Based on the above scheme, the sheath induced voltage matrix is ​​adjusted according to the difference between the simulated sheath induced voltage value obtained by simulation calculation and the actual sheath induced voltage value to obtain the target sheath induced voltage matrix, thereby improving the simulation accuracy of the obtained target sheath induced voltage matrix.

[0115] The present application also provides a method for identifying the sheath induced voltage of a multi-circuit parallel cable line. Figure 4 As shown, the specific processing process includes the following steps:

[0116] Step S401, acquiring line structure data of a multi-loop parallel cable line and current current sensing data of the multi-loop parallel cable line.

[0117] Step S402, obtaining a cable calculation model template, and identifying each cable structure of a multi-loop parallel cable and relative association information between each cable structure based on the line structure data.

[0118] Step S403, generating structural parameters of each cable structure based on the relative correlation information between each cable structure, optimizing the cable calculation model template based on each structural parameter, and obtaining a cable calculation model of a multi-loop parallel cable.

[0119] Step S404, based on the cable calculation model, identifying the sheath induced voltage algorithm of the multi-loop parallel cable line.

[0120] Step S405, matrix processing is performed on the sheath induced voltage algorithm to obtain a sheath induced voltage matrix of the multi-loop parallel cable line.

[0121] Step S406, obtaining the current operation memory and the current operation power, and based on the current operation memory and the current operation power, querying the number of matrices operated simultaneously in the operation database.

[0122] Step S407: Based on the number of matrices, the sheath induced voltage matrix is ​​subjected to matrix splitting processing by using a block matrix strategy to obtain sub-induced voltage matrices.

[0123] Step S408, obtaining the line cross-section structure of the multi-loop parallel cable line, and performing grid division processing on the line cross-section structure of the multi-loop parallel cable line to obtain each grid area.

[0124] Step S409, identifying the sub-induced voltage matrix corresponding to each grid area, and solving the sub-induced voltage matrix by a conjugate gradient algorithm based on the area size of the grid area corresponding to each sub-induced voltage matrix to obtain a matrix solution of the sub-induced voltage matrix.

[0125] Step S410: identifying matrix characteristic information of the sheath induced voltage matrix based on the matrix solutions of the sub-induced voltage matrices and the position information of the grid areas corresponding to the sub-induced voltage matrices in the line cross-section structure.

[0126] Step S411, obtain simulation parameters and actual sheath induced voltage values ​​corresponding to the simulation parameters, and based on the simulation parameters, simulate the current transmission process through the line structure model to obtain simulated sheath voltage data of the multi-loop parallel cable line, and based on the simulated sheath voltage data, calculate the simulated sheath induced voltage values ​​of the multi-loop parallel cable line through a cable calculation model including a sheath induced voltage matrix.

[0127] Step S412: adjusting the sheath induced voltage matrix based on the difference between the actual sheath induced voltage value and the simulated sheath induced voltage value to obtain a target sheath induced voltage matrix.

[0128] Step S413, based on the current current sensing data, the target sheath induced voltage value of the multi-loop parallel cable line is calculated by a cable calculation model including a target sheath induced voltage matrix.

[0129] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0130] Based on the same inventive concept, the embodiment of the present application also provides a sheath induced voltage identification device for a multi-circuit parallel cable line for implementing the sheath induced voltage identification method for a multi-circuit parallel cable line involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the embodiments of one or more sheath induced voltage identification devices for multi-circuit parallel cable lines provided below can refer to the limitations of the sheath induced voltage identification method for a multi-circuit parallel cable line above, and will not be repeated here.

[0131] In an exemplary embodiment, Figure 5 As shown, a device for identifying the sheath induced voltage of a multi-loop parallel cable line is provided, comprising: an acquisition module 510, a splitting module 520, an adjustment module 530 and a calculation module 540, wherein:

[0132] An acquisition module 510 is used to acquire line structure data of a multi-loop parallel cable line and current current sensing data of the multi-loop parallel cable line, and to construct a cable calculation model of the multi-loop parallel cable based on the line structure data;

[0133] A splitting module 520 is used to identify the sheath induced voltage matrix of the multi-loop parallel cable line based on the cable calculation model, and split the sheath induced voltage matrix into multiple sub-induced voltage matrices through a block matrix strategy;

[0134] An adjustment module 530 is used to identify the matrix characteristic information of the sheath induced voltage matrix based on each of the sub-induced voltage matrices, and adjust the sheath induced voltage matrix based on the line structure model of the multi-loop parallel cable line and the matrix characteristic information of the sheath induced voltage matrix to obtain a target sheath induced voltage matrix;

[0135] The calculation module 540 is used to calculate the target sheath induced voltage value of the multi-loop parallel cable line based on the current current sensing data through a cable calculation model including the target sheath induced voltage matrix.

[0136] Optionally, the acquisition module 510 is specifically configured to:

[0137] Acquire a cable calculation model template, and based on the line structure data, identify each cable structure of the multi-loop parallel cable and relative association information between each cable structure;

[0138] Based on the relative correlation information between the cable structures, the structural parameters of the cable structures are generated. Based on the structural parameters, the cable calculation model template is optimized to obtain the cable calculation model of the multi-loop parallel cable.

[0139] Optionally, the splitting module 530 is specifically used to:

[0140] Based on the cable calculation model, an algorithm for identifying the sheath induced voltage of the multi-loop parallel cable line;

[0141] The sheath induced voltage algorithm is matrix processed to obtain the sheath induced voltage matrix of the multi-loop parallel cable line.

[0142] Optionally, the splitting module 530 is specifically used to:

[0143] Acquire current computing memory and current computing power, and query the number of matrices to be computed simultaneously in a computing database based on the current computing memory and the current computing power;

[0144] Based on the number of matrices, the sheath induced voltage matrix is ​​subjected to matrix splitting processing through a block matrix strategy to obtain sub-induced voltage matrices.

[0145] Optionally, the adjustment module 540 is specifically configured to:

[0146] Acquire a line cross-sectional structure of the multi-loop parallel cable line, and perform grid division processing on the line cross-sectional structure of the multi-loop parallel cable line to obtain each grid area;

[0147] Identify the sub-induced voltage matrix corresponding to each grid area, and based on the area size of the grid area corresponding to each sub-induced voltage matrix, solve the sub-induced voltage matrix by a conjugate gradient algorithm to obtain a matrix solution of the sub-induced voltage matrix;

[0148] Based on the matrix solutions of the sub-induced voltage matrices and the position information of the grid areas corresponding to the sub-induced voltage matrices in the line cross-sectional structure, the matrix characteristic information of the sheath induced voltage matrix is ​​identified.

[0149] Optionally, the adjustment module 540 is specifically configured to:

[0150] Acquire simulation parameters and actual sheath induced voltage values ​​corresponding to the simulation parameters, and based on the simulation parameters, simulate the current transmission process through the line structure model to obtain simulated sheath voltage data of the multi-loop parallel cable line, and based on the simulated sheath voltage data, calculate the simulated sheath induced voltage value of the multi-loop parallel cable line through a cable calculation model including the sheath induced voltage matrix;

[0151] Based on the difference between the actual sheath induced voltage value and the simulated sheath induced voltage value, the sheath induced voltage matrix is ​​adjusted to obtain a target sheath induced voltage matrix.

[0152] Each module in the above-mentioned sheath induced voltage identification device for multi-circuit parallel cable lines can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each of the above modules.

[0153] In an exemplary embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 6As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for identifying the sheath induced voltage of a multi-loop parallel cable line is implemented. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0154] Those skilled in the art will understand that Figure 6 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0155] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the steps of any one of the methods in the first aspect are implemented.

[0156] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the methods in the first aspect are implemented.

[0157] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the steps of any one of the methods in the first aspect.

[0158] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0159] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in 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), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0160] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0161] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for identifying the sheath induced voltage of a multi-circuit parallel cable line, characterized in that: The method comprises: Acquire line structure data of a multi-loop parallel cable line and current current sensing data of the multi-loop parallel cable line, and construct a cable calculation model of the multi-loop parallel cable based on the line structure data; Based on the cable calculation model, identifying the sheath induced voltage matrix of the multi-loop parallel cable line, and splitting the sheath induced voltage matrix into a plurality of sub-induced voltage matrices through a block matrix strategy; Based on each of the sub-induced voltage matrices, the matrix characteristic information of the sheath induced voltage matrix is ​​identified, and based on the line structure model of the multi-loop parallel cable line and the matrix characteristic information of the sheath induced voltage matrix, the sheath induced voltage matrix is ​​adjusted to obtain a target sheath induced voltage matrix; Based on the current current sensing data, a target sheath induced voltage value of the multi-loop parallel cable line is calculated through a cable calculation model including the target sheath induced voltage matrix.

2. The method according to claim 1, characterized in that The step of constructing a cable calculation model of the multi-loop parallel cable based on the line structure data includes: Acquire a cable calculation model template, and based on the line structure data, identify each cable structure of the multi-loop parallel cable and relative association information between each cable structure; Based on the relative correlation information between the cable structures, the structural parameters of the cable structures are generated. Based on the structural parameters, the cable calculation model template is optimized to obtain the cable calculation model of the multi-loop parallel cable.

3. The method according to claim 2, characterized in that The identifying, based on the cable calculation model, the sheath induced voltage matrix of the multi-loop parallel cable line comprises: Based on the cable calculation model, an algorithm for identifying the sheath induced voltage of the multi-loop parallel cable line; The sheath induced voltage algorithm is matrix processed to obtain the sheath induced voltage matrix of the multi-loop parallel cable line.

4. The method according to claim 1, characterized in that The method of dividing the sheath induced voltage matrix into a plurality of sub-induced voltage matrices by using a block matrix strategy includes: Acquire current computing memory and current computing power, and query the number of matrices to be computed simultaneously in a computing database based on the current computing memory and the current computing power; Based on the number of matrices, the sheath induced voltage matrix is ​​subjected to matrix splitting processing through a block matrix strategy to obtain sub-induced voltage matrices.

5. The method according to claim 1, characterized in that The identifying matrix characteristic information of the sheath induced voltage matrix based on each of the sub-induced voltage matrices includes: Acquire a line cross-sectional structure of the multi-loop parallel cable line, and perform grid division processing on the line cross-sectional structure of the multi-loop parallel cable line to obtain each grid area; Identify the sub-induced voltage matrix corresponding to each grid area, and based on the area size of the grid area corresponding to each sub-induced voltage matrix, solve the sub-induced voltage matrix by a conjugate gradient algorithm to obtain a matrix solution of the sub-induced voltage matrix; Based on the matrix solutions of the sub-induced voltage matrices and the position information of the grid areas corresponding to the sub-induced voltage matrices in the line cross-sectional structure, the matrix characteristic information of the sheath induced voltage matrix is ​​identified.

6. The method according to claim 1, characterized in that The method of adjusting the sheath induced voltage matrix based on the line structure model of the multi-loop parallel cable line and the matrix characteristic information of the sheath induced voltage matrix to obtain a target sheath induced voltage matrix includes: Acquire simulation parameters and actual sheath induced voltage values ​​corresponding to the simulation parameters, and based on the simulation parameters, simulate the current transmission process through the line structure model to obtain simulated sheath voltage data of the multi-loop parallel cable line, and based on the simulated sheath voltage data, calculate the simulated sheath induced voltage value of the multi-loop parallel cable line through a cable calculation model including the sheath induced voltage matrix; Based on the difference between the actual sheath induced voltage value and the simulated sheath induced voltage value, the sheath induced voltage matrix is ​​adjusted to obtain a target sheath induced voltage matrix.

7. A sheath induced voltage identification device for a multi-circuit parallel cable line, characterized in that: The device comprises: An acquisition module, used to acquire line structure data of a multi-loop parallel cable line and current current sensing data of the multi-loop parallel cable line, and to construct a cable calculation model of the multi-loop parallel cable based on the line structure data; A splitting module is used to identify the sheath induced voltage matrix of the multi-loop parallel cable line based on the cable calculation model, and split the sheath induced voltage matrix into multiple sub-induced voltage matrices through a block matrix strategy; An adjustment module is used to identify the matrix characteristic information of the sheath induced voltage matrix based on each of the sub-induced voltage matrices, and adjust the sheath induced voltage matrix based on the line structure model of the multi-loop parallel cable line and the matrix characteristic information of the sheath induced voltage matrix to obtain a target sheath induced voltage matrix; A calculation module is used to calculate the target sheath induced voltage value of the multi-loop parallel cable line based on the current current sensing data through a cable calculation model including the target sheath induced voltage matrix.

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

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

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

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