Method and device for acquiring dynamic transient parameters of same-direction parallel cables and computer equipment

Abstract

The invention relates to a method and a device for acquiring dynamic transient parameters of parallel cables in the same direction and computer equipment. The method comprises the following steps: acquiring cable structure data, cable physical data and current current data of parallel cables in the same direction, and constructing a cable finite element model of the parallel cables in the same direction based on the cable structure data and the cable physical data; simulating the operation process of the same-direction parallel cables through the cable finite element model to obtain simulation operation data, and calculating simulation dynamic transient parameters of the same-direction parallel cables based on the simulation operation data; and identifying an error value between the current current data and simulation current data in the simulation operation data through a feedback control algorithm, and adjusting the simulation dynamic transient parameters based on the error value to obtain current dynamic transient parameters of the same-direction parallel cables. By adopting the method, the efficiency of acquiring the dynamic transient parameters of the same-direction parallel cables can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of co-directional parallel cables, and in particular to a method, device and computer equipment for acquiring dynamic transient parameters of co-directional parallel cables. Background Art

[0002] A unidirectional parallel cable is a cable that connects two or more cables with the same terminals so that they conduct current together. The unidirectional parallel cable can improve the power supply capacity and reduce cable losses. It has a wide range of applications in power systems, communication systems and other fields. In practical applications, the unidirectional parallel cables are subject to various transient excitations, such as switching operations, lightning strikes, pulse faults, etc. These transient excitations will cause dynamic changes in the electrical parameters of the unidirectional parallel cables, namely the dynamic transient parameters. The dynamic transient parameters reflect the response characteristics of the unidirectional parallel cables to transient excitations, which are crucial for analyzing the transient characteristics of the unidirectional parallel cables. Therefore, how to obtain the dynamic transient parameters of the unidirectional parallel cables is one of the current research focuses.

[0003] The traditional method of obtaining the dynamic transient parameters of the same-direction parallel cables is to obtain high-precision dynamic transient parameters of the same-direction parallel cables through modeling, experiments, or a combination of modeling and experiments. However, this method has high requirements on the experimental equipment and the accuracy of the experimental data, which makes the acquisition cost high and the acquisition accuracy low, resulting in poor efficiency in obtaining the dynamic transient parameters of the same-direction 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 obtaining dynamic transient parameters of parallel cables in the same direction in order to solve the above technical problems.

[0005] In a first aspect, the present application provides a method for obtaining dynamic transient parameters of parallel cables in the same direction, comprising:

[0006] Acquire cable structure data of the same-direction parallel cables, cable physical data of the same-direction parallel cables, and current current data of the same-direction parallel cables, and construct a cable finite element model of the same-direction parallel cables based on the cable structure data and the cable physical data;

[0007] The operation process of the parallel cables in the same direction is simulated by the cable finite element model to obtain simulation operation data, and based on the simulation operation data, the simulation dynamic transient parameters of the parallel cables in the same direction are calculated;

[0008] Through a feedback control algorithm, an error value between the current current data and the simulated current data in the simulation operation data is identified, and based on the error value, the simulated dynamic transient parameters are adjusted to obtain the current dynamic transient parameters of the co-directional parallel cables.

[0009] Optionally, constructing a cable finite element model of the co-directional parallel cables based on the cable structure data and the cable physical data includes:

[0010] Based on the cable structure data, identifying the three-dimensional structure data of each cable of the parallel cables in the same direction and the relative position relationship of each cable of the parallel cables in the same direction, and based on the cable physical data, identifying the parameter value of each parameter type of the parallel cables in the same direction;

[0011] Based on the three-dimensional structural data of each of the cables, a sub-cable structural model of each of the cables is constructed through a model construction strategy, and based on the relative position relationship of each of the cables, the sub-cable structural models of each of the cables are subjected to model splicing processing to obtain a three-dimensional cable structural model of the same-direction parallel cables;

[0012] The parameter values ​​of each parameter type are added to the three-dimensional cable structure model to obtain a cable finite element model of the co-directional parallel cables.

[0013] Optionally, simulating the operation process of the co-directional parallel cables through the cable finite element model to obtain simulation operation data includes:

[0014] Acquire current operation data of the cables connected in parallel in the same direction, and split the current operation data into cable operation data of each of the cables;

[0015] The cable operation data of each cable is respectively input into the sub-model corresponding to each cable of the cable finite element model to obtain each pre-simulation sub-model, and based on each pre-simulation sub-model, the operation process of the same-direction parallel cables is simulated to obtain simulation operation data.

[0016] Optionally, the calculating the simulated dynamic transient parameters of the co-directional parallel cables based on the simulation operation data includes:

[0017] Splitting the simulation running data into sub-data sets of each data type, and performing distribution sorting processing on the sub-data sets of each data type in chronological order to obtain data distribution information of each data type;

[0018] Based on the data distribution information of each data type, each simulated sub-dynamic transient parameter of the co-directional parallel cable is calculated respectively through the preset algorithm of each sub-dynamic transient parameter type, and all simulated sub-dynamic transient parameters are used as the simulated dynamic transient parameters of the co-directional parallel cable.

[0019] Optionally, identifying the error value between the current current data and the simulated current data in the simulation operation data by using a feedback control algorithm includes:

[0020] Splitting the current data into sub-current values ​​of each cable, and splitting the simulated current data in the simulation operation data into simulated sub-current values ​​of each cable;

[0021] By means of a feedback control algorithm, the sub-current value of each cable and the error value between the simulated sub-current value of each cable are calculated respectively;

[0022] The error values ​​of all cables are taken as the error values ​​between the current current data and the simulated current data in the simulation operation data.

[0023] Optionally, adjusting the simulated dynamic transient parameter based on the error value to obtain the current dynamic transient parameter of the co-directional parallel cable includes:

[0024] In the case where there is an error value greater than an error threshold, based on the error value of each cable, a control signal of each control signal type of each cable is calculated by an error control signal generation algorithm;

[0025] Based on the control signal of each control signal type of each cable, the sub-model of each cable is adjusted to obtain a new cable finite element model, and the new cable finite element model is used to replace the cable finite element model, and the operation process of the parallel cables in the same direction is simulated through the cable finite element model to obtain simulation operation data steps;

[0026] Until there is no cable with an error value greater than the error threshold, the simulated dynamic transient parameters obtained in the last iteration are used as the current dynamic transient parameters of the co-directional parallel cables.

[0027] In a second aspect, the present application further provides a device for acquiring dynamic transient parameters of parallel cables in the same direction, comprising:

[0028] An acquisition module, used for acquiring cable structure data of the same-direction parallel cables, cable physical data of the same-direction parallel cables, and current current data of the same-direction parallel cables, and constructing a cable finite element model of the same-direction parallel cables based on the cable structure data and the cable physical data;

[0029] A calculation module, used to simulate the operation process of the parallel cables in the same direction through the cable finite element model to obtain simulation operation data, and calculate the simulation dynamic transient parameters of the parallel cables in the same direction based on the simulation operation data;

[0030] The adjustment module is used to identify the error value between the current current data and the simulated current data in the simulation operation data through a feedback control algorithm, and adjust the simulated dynamic transient parameters based on the error value to obtain the current dynamic transient parameters of the co-directional parallel cables.

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

[0032] Based on the cable structure data, identifying the three-dimensional structure data of each cable of the parallel cables in the same direction and the relative position relationship of each cable of the parallel cables in the same direction, and based on the cable physical data, identifying the parameter value of each parameter type of the parallel cables in the same direction;

[0033] Based on the three-dimensional structural data of each of the cables, a sub-cable structural model of each of the cables is constructed through a model construction strategy, and based on the relative position relationship of each of the cables, the sub-cable structural models of each of the cables are subjected to model splicing processing to obtain a three-dimensional cable structural model of the same-direction parallel cables;

[0034] The parameter values ​​of each parameter type are added to the three-dimensional cable structure model to obtain a cable finite element model of the co-directional parallel cables.

[0035] Optionally, the computing module is specifically used for:

[0036] Acquire current operation data of the cables connected in parallel in the same direction, and split the current operation data into cable operation data of each of the cables;

[0037] The cable operation data of each cable is respectively input into the sub-model corresponding to each cable of the cable finite element model to obtain each pre-simulation sub-model, and based on each pre-simulation sub-model, the operation process of the same-direction parallel cables is simulated to obtain simulation operation data.

[0038] Optionally, the computing module is specifically used for:

[0039] Splitting the simulation running data into sub-data sets of each data type, and performing distribution sorting processing on the sub-data sets of each data type in chronological order to obtain data distribution information of each data type;

[0040] Based on the data distribution information of each data type, each simulated sub-dynamic transient parameter of the co-directional parallel cable is calculated respectively through the preset algorithm of each sub-dynamic transient parameter type, and all simulated sub-dynamic transient parameters are used as the simulated dynamic transient parameters of the co-directional parallel cable.

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

[0042] Splitting the current data into sub-current values ​​of each cable, and splitting the simulated current data in the simulation operation data into simulated sub-current values ​​of each cable;

[0043] By means of a feedback control algorithm, the sub-current value of each cable and the error value between the simulated sub-current value of each cable are calculated respectively;

[0044] The error values ​​of all cables are taken as the error values ​​between the current current data and the simulated current data in the simulation operation data.

[0045] Optionally, the adjustment module is specifically used to:

[0046] In the case where there is an error value greater than an error threshold, based on the error value of each cable, a control signal of each control signal type of each cable is calculated by an error control signal generation algorithm;

[0047] Based on the control signal of each control signal type of each cable, the sub-model of each cable is adjusted to obtain a new cable finite element model, and the new cable finite element model is used to replace the cable finite element model, and the operation process of the parallel cables in the same direction is simulated through the cable finite element model to obtain simulation operation data steps;

[0048] Until there is no cable with an error value greater than the error threshold, the simulated dynamic transient parameters obtained in the last iteration are used as the current dynamic transient parameters of the co-directional parallel cables.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] The above-mentioned method, device and computer equipment for obtaining the dynamic transient parameters of the same-direction parallel cables, by acquiring the cable structure data of the same-direction parallel cables, the cable physical data of the same-direction parallel cables, and the current current data of the same-direction parallel cables, and based on the cable structure data and the cable physical data, constructing a cable finite element model of the same-direction parallel cables; simulating the operation process of the same-direction parallel cables through the cable finite element model to obtain simulation operation data, and calculating the simulated dynamic transient parameters of the same-direction parallel cables based on the simulation operation data; identifying the error value between the current current data and the simulated current data in the simulation operation data through a feedback control algorithm, and adjusting the simulated dynamic transient parameters based on the error value to obtain the current dynamic transient parameters of the same-direction parallel cables. This scheme constructs a cable finite element model of the co-directional parallel cable through the cable structure data and cable physical data of the co-directional parallel cable. Since the finite element model has the characteristics of low cost, high precision, consideration of nonlinearity, simulation of complex structures, multi-field coupling, and wide applicability, when obtaining the dynamic transient parameters of the co-directional parallel cable by establishing the cable finite element model, it can effectively reduce the requirements for the experimental device, ensure the accuracy requirements of the experimental data, and greatly reduce the acquisition cost. Then this scheme also combines the feedback control algorithm to identify the error value of the current current data. Since the feedback control algorithm has the characteristics of simplicity, robustness, and universality, it improves the accuracy of the calculation while reducing the cost. Finally, the current dynamic transient parameters of the co-directional parallel cable are obtained by adjusting the error value calculated by the feedback control algorithm, which can not only reduce the acquisition cost and improve the acquisition accuracy, but also effectively improve the acquisition timeliness, thereby comprehensively improving the efficiency of obtaining the dynamic transient parameters of the co-directional parallel cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] 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.

[0054] Figure 1 It is a schematic flow chart of a method for obtaining dynamic transient parameters of cables connected in parallel in the same direction in one embodiment;

[0055] Figure 2A schematic diagram of a flow chart of an example of obtaining dynamic transient parameters of cables connected in parallel in the same direction in one embodiment;

[0056] Figure 3 It is a structural block diagram of a device for acquiring dynamic transient parameters of parallel cables in the same direction in one embodiment;

[0057] Figure 4 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 acquisition method of the dynamic transient parameters of the parallel cables in the same direction provided in the embodiment of the present application can be applied to the application environment of the cable structure equipment. Among them, the method can be applied to the terminal, can also be applied to the server, can also be applied to the system including the terminal and the server, and is realized by the interaction between the terminal and the server. Among them, the terminal can be, but not limited to, various personal computers, laptops, etc. Among them, the terminal constructs the cable finite element model of the parallel cables in the same direction through the cable structure data and cable physical data of the parallel cables in the same direction, and because the finite element model has the characteristics of low cost, high precision, consideration of nonlinearity, simulation of complex structures, multi-field coupling, and wide applicability, when the dynamic transient parameters of the parallel cables in the same direction are obtained by establishing the cable finite element model, the requirements for the experimental device can be effectively reduced, the accuracy requirements of the experimental data can be ensured, and the acquisition cost can be greatly reduced. Then this scheme is also combined with the feedback control algorithm to identify the error value of the current current data. Because the feedback control algorithm has the characteristics of simplicity, robustness, and generality, the accuracy of the calculation is improved while reducing the cost. Finally, the error value calculated by the feedback control algorithm is adjusted to obtain the current dynamic transient parameters of the co-directional parallel cables, which can not only reduce the acquisition cost and improve the acquisition accuracy, but also effectively improve the acquisition timeliness, thereby comprehensively improving the efficiency of obtaining the dynamic transient parameters of the co-directional parallel cables.

[0060] In an exemplary embodiment, Figure 1 As shown, a method for obtaining dynamic transient parameters of parallel cables in the same direction is provided, and the method is applied to a terminal as an example for explanation, including the following steps S101 to S103. Among them:

[0061] Step S101, obtaining cable structure data, cable physical data, and current current data of the same-direction parallel cables, and constructing a cable finite element model of the same-direction parallel cables based on the cable structure data and the cable physical data.

[0062] In this embodiment, the terminal responds to the data upload operation of the staff to obtain the cable structure data of each cable and the physical data of each cable of the parallel cable in the same direction. The cable structure data includes the cable structure data of each cable of each phase of the parallel cable in the same direction, and the relative position relationship between the cables, wherein the cable structure data is the data corresponding to the actual size and structure of each cable, and the data includes the length, diameter, conductor shape, insulation layer thickness and other data of the cable. The cable physical data includes the material parameters, boundary conditions, excitation signals, mesh division and other data of the cable, and defines the material parameters of the cable, including the resistivity and permeability of the conductor, the dielectric constant of the insulation layer, etc. Boundary conditions are applied to reflect the actual boundary conditions of the cable. The excitation signal is set to simulate the electrical excitation received by the cable. The mesh division is to divide the cable from the outside to the inside according to the importance of the research part, and the cable structure parts of different mesh sizes are screened by the staff. The mesh can be a square mesh, a triangular mesh, a polygonal mesh, etc. Then, the terminal obtains the current current data of the same-direction parallel cables. The current data is that the working unit sets a current sensor in each phase of the same-direction parallel cables, which includes two parallel conductors (i.e., each cable), so that the current value of each cable can be obtained in real time. Then, the terminal obtains the current data of the same-direction parallel cables by receiving the current value of each cable fed back by each current sensor in real time.

[0063] The current data for each cable is:

[0064] I measure =I(t)

[0065] In the formula, I measure It is a real-time measurement of ground current value.

[0066] Finally, the terminal constructs a cable finite element model of the co-directional parallel cables based on the cable structure data and the cable physical data. The cable finite element model is a cable simulation model constructed by a numerical simulation tool using the finite element method (FEM). The specific construction process will be described in detail later.

[0067] Step S102, simulating the operation process of the parallel cables in the same direction by using a cable finite element model to obtain simulation operation data, and calculating the simulation dynamic transient parameters of the parallel cables in the same direction based on the simulation operation data.

[0068] In this embodiment, the terminal simulates the operation process of the co-directional parallel cables through the cable finite element model, obtains the simulation operation data, and calculates the simulation dynamic transient parameters of the co-directional parallel cables based on the simulation operation data. Among them, the simulation operation data includes the sub-simulation operation log information of each cable. Among them, the lid simulation operation log information records the electric field data, magnetic field data, current density data and other data of each cable at each simulation moment. The specific simulation process will be described in detail later. Among them, the method of calculating the simulation dynamic transient parameters of the co-directional parallel cables is to calculate the simulation dynamic transient parameters obtained by the algorithm corresponding to each dynamic transient parameter type. Among them, each dynamic transient parameter type includes but is not limited to parameter types such as capacitance type, inductance type, impedance type, characteristic impedance type, propagation constant type, reflection constant type, and projection constant type. The specific calculation process will be described in detail later.

[0069] Step S103, identifying the error value between the current current data and the simulated current data in the simulation operation data through a feedback control algorithm, and adjusting the simulated dynamic transient parameters based on the error value to obtain the current dynamic transient parameters of the same-direction parallel cables.

[0070] In this embodiment, the terminal identifies the error value between the current current data and the simulated current data in the simulation operation data through a feedback control algorithm, and adjusts the simulated dynamic transient parameters based on the error value to obtain the current dynamic transient parameters of the co-directional parallel cables. The feedback control algorithm is a proportional-integral-derivative control algorithm (ProportionalIntegralDerivative control, PID) control algorithm. The specific identification and adjustment process will be described in detail later.

[0071] Based on the above scheme, the cable finite element model of the co-directional parallel cable is constructed through the cable structure data and cable physical data of the co-directional parallel cable. Since the finite element model has the characteristics of low cost, high precision, consideration of nonlinearity, simulation of complex structures, multi-field coupling, and wide applicability, when the dynamic transient parameters of the co-directional parallel cable are obtained by establishing the cable finite element model, the requirements for the experimental device can be effectively reduced, the accuracy requirements of the experimental data can be ensured, and the acquisition cost can be greatly reduced. Then this scheme also combines the feedback control algorithm to identify the error value of the current current data. Since the feedback control algorithm has the characteristics of simplicity, robustness and universality, it improves the accuracy of the calculation while reducing the cost. Finally, the current dynamic transient parameters of the co-directional parallel cable are obtained by adjusting the error value calculated by the feedback control algorithm, which can not only reduce the acquisition cost and improve the acquisition accuracy, but also effectively improve the acquisition timeliness, thereby comprehensively improving the efficiency of obtaining the dynamic transient parameters of the co-directional parallel cable.

[0072] Optionally, a cable finite element model of the same-direction parallel cables is constructed based on the cable structure data and the cable physical data, including: based on the cable structure data, identifying the three-dimensional structure data of each cable of the same-direction parallel cables and the relative position relationship of each cable of the same-direction parallel cables, and based on the cable physical data, identifying the parameter values ​​of each parameter type of the same-direction parallel cables; based on the three-dimensional structure data of each cable, constructing a sub-cable structure model of each cable through a model construction strategy, and based on the relative position relationship of each cable, model splicing the sub-cable structure models of each cable to obtain a three-dimensional cable structure model of the same-direction parallel cables; adding the parameter values ​​of each parameter type to the three-dimensional cable structure model to obtain a cable finite element model of the same-direction parallel cables.

[0073] In this embodiment, the terminal identifies the three-dimensional structure data of each cable of the parallel cables in the same direction and the relative position relationship of each cable of the parallel cables in the same direction based on the cable structure data, and identifies the parameter values ​​of each parameter type of the parallel cables in the same direction based on the cable physical data. The parameter types include but are not limited to the resistivity type of the conductor, the magnetic permeability type, the dielectric constant type of the insulation layer, the cable boundary condition parameter type, the excitation signal parameter type, and the meshing parameter type.

[0074] Then, the terminal constructs a sub-cable structure model of each cable based on the three-dimensional structure data of each cable through a model construction strategy, wherein the model construction strategy is a model construction strategy corresponding to the finite element method.

[0075] Then, based on the relative position relationship of each cable, the terminal splices the sub-cable structure model of each cable to obtain a three-dimensional cable structure model of the same-direction parallel cables. Finally, the terminal adds the parameter values ​​of each parameter type to the three-dimensional cable structure model through the parameter assignment strategy corresponding to the finite element method to obtain the cable finite element model of the same-direction parallel cables.

[0076] Based on the above scheme, a cable finite element model of the co-directional parallel cables is constructed through the finite element method, which includes the actual size and structure of the cable, material parameters, boundary conditions, excitation signals, and mesh division. This reduces the model cost while improving the modeling accuracy and coupling accuracy of complex co-directional parallel cables.

[0077] Optionally, the operation process of the same-direction parallel cables is simulated through a cable finite element model to obtain simulation operation data, including: obtaining current operation data of the same-direction parallel cables, and splitting the current operation data into cable operation data of each cable; inputting the cable operation data of each cable into sub-models corresponding to each cable of the cable finite element model respectively to obtain each pre-simulation sub-model; and based on each pre-simulation sub-model, simulating the operation process of the same-direction parallel cables to obtain simulation operation data.

[0078] In this embodiment, the terminal obtains the current operation data of the parallel cables in the same direction, and splits the current operation data into the cable operation data of each cable. Then, the terminal inputs the cable operation data of each cable into the sub-models corresponding to each cable of the cable finite element model, obtains each pre-simulation sub-model, and simulates the operation process of the parallel cables in the same direction based on each pre-simulation sub-model to obtain the simulation operation data. The current operation data may be, but is not limited to, data such as the voltage value, current value, and current input rate of each cable currently input.

[0079] Based on the above scheme, the cable operation process is simulated by the current operation data, so that the accuracy of the simulated dynamic transient parameters obtained by comparing the obtained simulated operation data with the current current data can be adjusted to ensure the accuracy of the obtained dynamic transient parameters.

[0080] Optionally, based on the simulation operation data, the simulation dynamic transient parameters of the co-directional parallel cables are calculated, including: splitting the simulation operation data into sub-data sets of each data type, and distributing and sorting the sub-data sets of each data type in chronological order to obtain data distribution information of each data type; based on the data distribution information of each data type, each simulation sub-dynamic transient parameter of the co-directional parallel cables is calculated by a preset algorithm of each sub-dynamic transient parameter type, and all the simulation sub-dynamic transient parameters are used as the simulation dynamic transient parameters of the co-directional parallel cables.

[0081] In this embodiment, the terminal uses the Newton method in the iterative method based on Taylor expansion to iteratively solve the obtained simulation operation data at each time to obtain a sub-data set of each data type for each cable. The data types include but are not limited to electric field, magnetic field, current density and other data. The iterative formula of the Newton method is:

[0082] x[n+1]=x[n]-J[n] -1 ×f[n]

[0083] Where: x[n] is the solution vector of the nth iteration, x[n+1] is the solution vector of the n+1th iteration, J[n] is the Jacobian matrix of the nth iteration, and f[n] is the residual vector of the nth iteration.

[0084] Then, the terminal performs distribution sorting processing on the sub-data sets of each data type in chronological order to obtain data distribution information of each data type.

[0085] Finally, based on the data distribution information of each data type, the terminal calculates the simulated sub-dynamic transient parameters of the same-direction parallel cables respectively through the preset algorithms of each sub-dynamic transient parameter type, and uses all the simulated sub-dynamic transient parameters as the simulated dynamic transient parameters of the same-direction parallel cables.

[0086] Among them, the preset algorithms for each sub-dynamic transient parameter type include:

[0087] The resistance of the cable can be calculated using the following formula:

[0088]

[0089] Where: R is the cable resistance, ρ is the conductor resistivity, L is the cable length, and A is the conductor cross-sectional area.

[0090] The inductance of the cable can be calculated using the following formula:

[0091]

[0092] Where: L is the cable inductance, μ0 is the vacuum permeability, μ r is the relative magnetic permeability of the conductor, N is the number of turns per unit length, A is the cross-sectional area of ​​the conductor, and l is the turn length.

[0093] The capacitance of the cable can be calculated using the following formula:

[0094]

[0095] Where: C is the cable capacitance, ε0 is the vacuum dielectric constant, ε r is the relative dielectric constant of the insulating layer, A is the cross-sectional area of ​​the insulating layer, and l is the length of the insulating layer.

[0096] The characteristic impedance of the cable can be calculated by the following formula:

[0097]

[0098] Where Z0 is the characteristic impedance of the cable.

[0099] The propagation constant of the cable can be calculated using the following formula:

[0100]

[0101] Where: γ is the cable propagation constant, G is the cable conductivity.

[0102] The reflection constant of the cable can be calculated using the following formula:

[0103]

[0104] Where: Γ is the cable reflection constant, Z0 is the cable characteristic impedance, Z L Load impedance.

[0105] The projection constant of the cable can be calculated using the following formula:

[0106] S=1+Γ 2

[0107] Where: S is the cable projection constant.

[0108] Based on the above scheme, after solving the sub-data sets of each data type by Newton's method, distributed processing is performed to calculate the dynamic transient parameters of each simulation sub-parallel cable in the same direction according to the preset algorithm of each sub-dynamic transient parameter type, thereby improving the accuracy of the calculated dynamic transient parameters of each simulation sub-dynamic transient parameter.

[0109] Optionally, a feedback control algorithm is used to identify the error value between the current current data and the simulated current data in the simulation operation data, including: splitting the current current data into sub-current values ​​of each cable, and splitting the simulated current data in the simulation operation data into simulated sub-current values ​​of each cable; calculating the error value between the sub-current value of each cable and the simulated sub-current value of each cable respectively through a feedback control algorithm; and using the error values ​​of all cables as the error value between the current current data and the simulated current data in the simulation operation data.

[0110] In this embodiment, the terminal splits the current data into sub-current values ​​of each cable, and splits the simulated current data in the simulation operation data into simulated sub-current values ​​of each cable. Then, the terminal calculates the sub-current value of each cable and the error value between the simulated sub-current value of each cable through a feedback control algorithm. The error calculation formula of the feedback control algorithm is:

[0111] e(t)=I measure,1 -I measure,2

[0112] Where e(t) is the current difference at time t, I measure,1 is the sub-current value of the cable, I measure,2 is the simulated sub-current value of the cable. The terminal can quantify the deviation between the current system state and the actual state by calculating the error.

[0113] Finally, the terminal uses the error values ​​of all cables as the error values ​​between the current current data and the simulated current data in the simulation operation data.

[0114] Based on the above scheme, the error value of each cable is calculated separately through the feedback control algorithm, which improves the accuracy of the calculation and reduces the calculation cost.

[0115] Optionally, based on the error value, the simulation dynamic transient parameters are adjusted to obtain the current dynamic transient parameters of the co-directional parallel cables, including: in the case where the error value is greater than the error threshold, based on the error value of each cable, the control signal of each control signal type of each cable is calculated through the error control signal generation algorithm; based on the control signal of each control signal type of each cable, the sub-model of each cable is adjusted to obtain a new cable finite element model, and the new cable finite element model is used to replace the cable finite element model, and the execution is returned to simulate the operation process of the co-directional parallel cables through the cable finite element model to obtain the simulation operation data step; until there are no cables with error values ​​greater than the error threshold, the simulation dynamic transient parameters obtained by the last iteration are used as the current dynamic transient parameters of the co-directional parallel cables.

[0116] In this embodiment, when there is an error value greater than the error threshold, the terminal calculates the control signal of each control signal type of each cable based on the error value of each cable through the error control signal generation algorithm. The control signal type includes but is not limited to a proportional gain signal type, an integral gain signal type, and a differential gain signal type. The calculation formula of the error control signal generation algorithm is to generate a comprehensive control signal through a proportional (P), integral (I) and differential (D) control algorithm:

[0117]

[0118] In the formula, K p is the proportional gain. Proportional control quickly responds to the current error, reduces response time, and improves control accuracy; K i is the integral gain. Integral control eliminates the steady-state error of the system and ensures the accuracy of the system in long-term operation; K d is the differential gain. The differential control predicts the error change trend, suppresses system oscillation, and improves system stability. The total control signal u(t) is formed by superimposing the control signals of the above three parts.

[0119] Based on the control signals of each control signal type of each cable, the terminal adjusts the sub-model of each cable through the PID control system to obtain a new cable finite element model, and replaces the cable finite element model with the new cable finite element model, and returns to execute the operation process of the cable finite element model to simulate the operation of the parallel cables in the same direction to obtain the simulation operation data step. Finally, until there is no cable with an error value greater than the error threshold, the terminal uses the simulation dynamic transient parameters obtained from the last iteration as the current dynamic transient parameters of the parallel cables in the same direction.

[0120] Based on the above scheme, the cable simulation model is cyclically adjusted through the comprehensive control signal corresponding to the error value to obtain more accurate current dynamic transient parameters, thereby improving the accuracy of obtaining dynamic transient parameters.

[0121] The present application also provides an example of obtaining dynamic transient parameters of parallel cables in the same direction, such as Figure 2 As shown, the specific processing process includes the following steps:

[0122] Step S201, obtaining cable structure data of the same-direction parallel cables, cable physical data of the same-direction parallel cables, and current current data of the same-direction parallel cables.

[0123] Step S202, based on the cable structure data, identify the three-dimensional structure data of each cable of the same-direction parallel cables and the relative position relationship of each cable of the same-direction parallel cables, and based on the cable physical data, identify the parameter value of each parameter type of the same-direction parallel cables.

[0124] Step S203, based on the three-dimensional structural data of each cable, a sub-cable structural model of each cable is constructed through a model construction strategy, and based on the relative position relationship of each cable, the sub-cable structural model of each cable is model spliced ​​to obtain a three-dimensional cable structural model of the same-direction parallel cables.

[0125] Step S204, adding the parameter values ​​of each parameter type to the three-dimensional cable structure model to obtain a cable finite element model of the parallel cables in the same direction.

[0126] Step S205, obtaining current operation data of the cables connected in parallel in the same direction, and splitting the current operation data into cable operation data of each cable.

[0127] Step S206, inputting the cable operation data of each cable into the sub-model corresponding to each cable of the cable finite element model respectively, obtaining each pre-simulation sub-model, and simulating the operation process of the same-direction parallel cables based on each pre-simulation sub-model to obtain simulation operation data.

[0128] Step S207 , splitting the simulation running data into sub-data sets of each data type, and performing distribution sorting processing on the sub-data sets of each data type in chronological order to obtain data distribution information of each data type.

[0129] Step S208, based on the data distribution information of each data type, each simulated sub-dynamic transient parameter of the same-direction parallel cable is calculated respectively through the preset algorithm of each sub-dynamic transient parameter type, and all the simulated sub-dynamic transient parameters are used as the simulated dynamic transient parameters of the same-direction parallel cable.

[0130] Step S209: split the current current data into sub-current values ​​of each cable, and split the simulated current data in the simulation operation data into simulated sub-current values ​​of each cable.

[0131] Step S210, calculating the error value between the sub-current value of each cable and the simulated sub-current value of each cable respectively through a feedback control algorithm.

[0132] Step S211 : taking the error values ​​of all cables as the error values ​​between the current current data and the simulated current data in the simulation operation data.

[0133] Step S212: when there is an error value greater than the error threshold, based on the error value of each cable, a control signal of each control signal type of each cable is calculated by an error control signal generation algorithm.

[0134] Step S213, based on the control signal of each control signal type of each cable, adjust the sub-model of each cable to obtain a new cable finite element model, and replace the cable finite element model with the new cable finite element model, return to execute through the cable finite element model, simulate the operation process of the same-direction parallel cables, and obtain the simulation operation data step.

[0135] Step S214, until there is no cable with an error value greater than the error threshold, the simulated dynamic transient parameters obtained in the last iteration are used as the current dynamic transient parameters of the parallel cables in the same direction.

[0136] 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.

[0137] Based on the same inventive concept, the embodiment of the present application also provides a device for acquiring dynamic transient parameters of parallel cables in the same direction for implementing the method for acquiring dynamic transient parameters of parallel cables in the same direction 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 the device for acquiring dynamic transient parameters of one or more parallel cables in the same direction provided below can refer to the limitations of the method for acquiring dynamic transient parameters of parallel cables in the above text, and will not be repeated here.

[0138] In an exemplary embodiment, Figure 3As shown, a device for acquiring dynamic transient parameters of parallel cables in the same direction is provided, comprising: an acquisition module 310, a calculation module 320 and an adjustment module 330, wherein:

[0139] An acquisition module 310 is used to acquire cable structure data of the same-direction parallel cables, cable physical data of the same-direction parallel cables, and current current data of the same-direction parallel cables, and to construct a cable finite element model of the same-direction parallel cables based on the cable structure data and the cable physical data;

[0140] A calculation module 320 is used to simulate the operation process of the parallel cables in the same direction by using the cable finite element model to obtain simulation operation data, and calculate the simulation dynamic transient parameters of the parallel cables in the same direction based on the simulation operation data;

[0141] The adjustment module 330 is used to identify the error value between the current current data and the simulated current data in the simulation operation data through a feedback control algorithm, and adjust the simulated dynamic transient parameters based on the error value to obtain the current dynamic transient parameters of the co-directional parallel cables.

[0142] Optionally, the acquisition module 310 is specifically configured to:

[0143] Based on the cable structure data, identifying the three-dimensional structure data of each cable of the parallel cables in the same direction and the relative position relationship of each cable of the parallel cables in the same direction, and based on the cable physical data, identifying the parameter value of each parameter type of the parallel cables in the same direction;

[0144] Based on the three-dimensional structural data of each of the cables, a sub-cable structural model of each of the cables is constructed through a model construction strategy, and based on the relative position relationship of each of the cables, the sub-cable structural models of each of the cables are subjected to model splicing processing to obtain a three-dimensional cable structural model of the same-direction parallel cables;

[0145] The parameter values ​​of each parameter type are added to the three-dimensional cable structure model to obtain a cable finite element model of the co-directional parallel cables.

[0146] Optionally, the calculation module 320 is specifically used for:

[0147] Acquire current operation data of the cables connected in parallel in the same direction, and split the current operation data into cable operation data of each of the cables;

[0148] The cable operation data of each cable is respectively input into the sub-model corresponding to each cable of the cable finite element model to obtain each pre-simulation sub-model, and based on each pre-simulation sub-model, the operation process of the same-direction parallel cables is simulated to obtain simulation operation data.

[0149] Optionally, the calculation module 320 is specifically used for:

[0150] Splitting the simulation running data into sub-data sets of each data type, and performing distribution sorting processing on the sub-data sets of each data type in chronological order to obtain data distribution information of each data type;

[0151] Based on the data distribution information of each data type, each simulated sub-dynamic transient parameter of the co-directional parallel cable is calculated respectively through the preset algorithm of each sub-dynamic transient parameter type, and all simulated sub-dynamic transient parameters are used as the simulated dynamic transient parameters of the co-directional parallel cable.

[0152] Optionally, the adjustment module 330 is specifically configured to:

[0153] Splitting the current data into sub-current values ​​of each cable, and splitting the simulated current data in the simulation operation data into simulated sub-current values ​​of each cable;

[0154] By means of a feedback control algorithm, the sub-current value of each cable and the error value between the simulated sub-current value of each cable are calculated respectively;

[0155] The error values ​​of all cables are taken as the error values ​​between the current current data and the simulated current data in the simulation operation data.

[0156] Optionally, the adjustment module 330 is specifically configured to:

[0157] In the case where there is an error value greater than an error threshold, based on the error value of each cable, a control signal of each control signal type of each cable is calculated by an error control signal generation algorithm;

[0158] Based on the control signal of each control signal type of each cable, the sub-model of each cable is adjusted to obtain a new cable finite element model, and the new cable finite element model is used to replace the cable finite element model, and the operation process of the parallel cables in the same direction is simulated through the cable finite element model to obtain simulation operation data steps;

[0159] Until there is no cable with an error value greater than the error threshold, the simulated dynamic transient parameters obtained in the last iteration are used as the current dynamic transient parameters of the co-directional parallel cables.

[0160] Each module in the above-mentioned device for acquiring dynamic transient parameters of the same-direction parallel cable 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 the processor in the computer device in the form of hardware, or can be stored in the memory in the computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0161] 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 4 As 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 an 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 implemented 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 obtaining dynamic transient parameters of a co-directional parallel cable 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.

[0162] Those skilled in the art will understand that Figure 4 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.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] 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.

[0167] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0168] 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.

[0169] 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 obtaining dynamic transient parameters of parallel cables in the same direction, characterized in that: The method comprises: Acquire cable structure data of the same-direction parallel cables, cable physical data of the same-direction parallel cables, and current current data of the same-direction parallel cables, and construct a cable finite element model of the same-direction parallel cables based on the cable structure data and the cable physical data; The operation process of the parallel cables in the same direction is simulated by the cable finite element model to obtain simulation operation data, and based on the simulation operation data, the simulation dynamic transient parameters of the parallel cables in the same direction are calculated; Through a feedback control algorithm, an error value between the current current data and the simulated current data in the simulation operation data is identified, and based on the error value, the simulated dynamic transient parameters are adjusted to obtain the current dynamic transient parameters of the co-directional parallel cables.

2. The method according to claim 1, characterized in that: The constructing of a cable finite element model of the co-directional parallel cables based on the cable structure data and the cable physical data comprises: Based on the cable structure data, identifying the three-dimensional structure data of each cable of the parallel cables in the same direction and the relative position relationship of each cable of the parallel cables in the same direction, and based on the cable physical data, identifying the parameter value of each parameter type of the parallel cables in the same direction; Based on the three-dimensional structural data of each of the cables, a sub-cable structural model of each of the cables is constructed through a model construction strategy, and based on the relative position relationship of each of the cables, the sub-cable structural models of each of the cables are subjected to model splicing processing to obtain a three-dimensional cable structural model of the same-direction parallel cables; The parameter values ​​of each parameter type are added to the three-dimensional cable structure model to obtain a cable finite element model of the co-directional parallel cables.

3. The method according to claim 1, characterized in that The operation process of the parallel cables in the same direction is simulated by the cable finite element model to obtain simulation operation data, including: Acquire current operation data of the cables connected in parallel in the same direction, and split the current operation data into cable operation data of each of the cables; The cable operation data of each cable is respectively input into the sub-model corresponding to each cable of the cable finite element model to obtain each pre-simulation sub-model, and based on each pre-simulation sub-model, the operation process of the same-direction parallel cables is simulated to obtain simulation operation data.

4. The method according to claim 3, characterized in that The step of calculating the simulated dynamic transient parameters of the co-directional parallel cables based on the simulated operation data includes: Splitting the simulation running data into sub-data sets of each data type, and performing distribution sorting processing on the sub-data sets of each data type in chronological order to obtain data distribution information of each data type; Based on the data distribution information of each data type, each simulated sub-dynamic transient parameter of the co-directional parallel cable is calculated respectively through the preset algorithm of each sub-dynamic transient parameter type, and all simulated sub-dynamic transient parameters are used as the simulated dynamic transient parameters of the co-directional parallel cable.

5. The method according to claim 1, characterized in that The step of identifying the error value between the current current data and the simulated current data in the simulation operation data by using a feedback control algorithm includes: Splitting the current data into sub-current values ​​of each cable, and splitting the simulated current data in the simulation operation data into simulated sub-current values ​​of each cable; By means of a feedback control algorithm, the sub-current value of each cable and the error value between the simulated sub-current value of each cable are calculated respectively; The error values ​​of all cables are taken as the error values ​​between the current current data and the simulated current data in the simulation operation data.

6. The method according to claim 5, characterized in that The adjusting the simulated dynamic transient parameters based on the error value to obtain the current dynamic transient parameters of the co-directional parallel cables includes: In the case where there is an error value greater than an error threshold, based on the error value of each cable, a control signal of each control signal type of each cable is calculated by an error control signal generation algorithm; Based on the control signal of each control signal type of each cable, the sub-model of each cable is adjusted to obtain a new cable finite element model, and the new cable finite element model is used to replace the cable finite element model, and the operation process of the parallel cables in the same direction is simulated through the cable finite element model to obtain simulation operation data steps; Until there is no cable with an error value greater than the error threshold, the simulated dynamic transient parameters obtained in the last iteration are used as the current dynamic transient parameters of the co-directional parallel cables.

7. A device for acquiring dynamic transient parameters of parallel cables in the same direction, characterized in that: The device comprises: An acquisition module, used for acquiring cable structure data of the same-direction parallel cables, cable physical data of the same-direction parallel cables, and current current data of the same-direction parallel cables, and constructing a cable finite element model of the same-direction parallel cables based on the cable structure data and the cable physical data; A calculation module, used to simulate the operation process of the parallel cables in the same direction through the cable finite element model to obtain simulation operation data, and calculate the simulation dynamic transient parameters of the parallel cables in the same direction based on the simulation operation data; The adjustment module is used to identify the error value between the current current data and the simulated current data in the simulation operation data through a feedback control algorithm, and adjust the simulated dynamic transient parameters based on the error value to obtain the current dynamic transient parameters of the co-directional parallel cables.

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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