Methods, apparatus, and computer equipment for calculating cable current-carrying imbalance.

Abstract

This application relates to a method, apparatus, and computer equipment for calculating the current-carrying imbalance of a cable. The method includes: acquiring various electrical parameters, laying environment data, and cable structure data of a parallel cable in the same direction, and constructing an environmental impedance matrix of the parallel cable; constructing an environmental cable cross-section model of the parallel cable based on the above data, and identifying various associated parameters of the parallel cable; constructing a full-line equivalent circuit model of the parallel cable based on each associated parameter; identifying the current-carrying distribution information of the parallel cable based on the full-line equivalent circuit model, and calculating the current-carrying imbalance of the parallel cable based on the current-carrying distribution information. This method can improve the safety and operating efficiency of power systems.

Description

Technical Field

[0001] This application relates to the field of power cable technology, and in particular to a method, apparatus and computer equipment for calculating cable current-carrying imbalance. Background Technology

[0002] In modern power systems, parallel cable connection is a common method for increasing power capacity. By connecting multiple cables in parallel, the power transmission capacity can be effectively improved. However, due to differences in cable length, impedance, contact resistance, and other factors, parallel cables in the same phase often experience current-carrying imbalance in actual operation. This imbalance can lead to overload of some cables, accelerating aging and even causing failures, while other cables are not fully utilized, reducing the overall efficiency of the system.

[0003] In existing technologies, the main methods for resolving current-carrying imbalance include impedance matching, current monitoring, and numerical simulation. Impedance matching reduces current-carrying imbalance by precisely measuring and matching the resistance, inductance, and other parameters of each cable. However, this method requires high-precision measurement equipment and complex calculations. Furthermore, cable impedance may change due to environmental variations and aging, affecting the matching effect. This makes it difficult to handle dynamic changes in cable parameters, requiring high-precision measurements and complex calculations. Therefore, a simpler and more efficient method is urgently needed to calculate and optimize the current-carrying imbalance of parallel cables in the same phase, thereby improving the safety and operational efficiency of power systems. Summary of the Invention

[0004] Therefore, it is necessary to provide a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for calculating cable current-carrying imbalance in response to the above-mentioned technical problems.

[0005] Firstly, this application provides a method for calculating the current-carrying imbalance of a cable. The method includes:

[0006] Obtain the electrical parameters of the parallel cable in the same direction, the laying environment data of the parallel cable in the same direction, and the cable structure data of the parallel cable in the same direction, and construct the environmental impedance matrix of the parallel cable in the same direction based on the electrical parameters.

[0007] Based on the laying environment data and the structural data of the parallel cable in the same direction, an environmental cable cross-section model of the parallel cable in the same direction is constructed, and based on the environmental cable cross-section model and the environmental impedance matrix, the associated parameters of the parallel cable in the same direction are identified.

[0008] Based on the aforementioned associated parameters, a full-circuit equivalent circuit model of the parallel cable in the same direction is constructed.

[0009] Based on the equivalent circuit model of the entire line, the current-carrying distribution information of the parallel cables in the same direction is identified, and the current-carrying imbalance of the parallel cables in the same direction is calculated based on the current-carrying distribution information.

[0010] Optionally, constructing the environmental impedance matrix of the parallel cables in the same direction based on the electrical parameters includes:

[0011] Based on the electrical parameters, the impedance values ​​of each impedance type are identified, and based on the impedance values ​​of each impedance type, an initial impedance matrix of the parallel cable in the same direction is constructed; the impedance types include environmental impedance type and non-environmental impedance type;

[0012] Based on the impedance value of the environmental impedance type, the initial impedance matrix is ​​subjected to matrix transformation to obtain the impedance matrix of the parallel cable in the same direction, and the impedance matrix is ​​used as the environmental impedance matrix of the parallel cable in the same direction.

[0013] Optionally, the step of constructing an environmental cable cross-section model of the parallel cable based on the laying environment data and the structural data of the parallel cable in the same direction includes:

[0014] Based on the structural data of the parallel cable in the same direction, the structural parameters of each structural component of the parallel cable in the same direction are identified, and based on the laying environment data, the medium structure parameters of different environmental media are identified.

[0015] Based on the structural parameters of each structural component of the parallel cable, a sub-cable cross-section model of the parallel cable is constructed using a modeling program. Based on the dielectric structure parameters of each environmental medium, an environmental cross-section model of the parallel cable is constructed using the modeling program.

[0016] The relative positional relationship between the laying environment and the parallel cables in the same direction, as well as the relative positional relationship between each of the parallel cables in the same direction, is obtained. Based on the relative positional relationship between the laying environment and the parallel cables in the same direction, as well as the relative positional relationship between each of the parallel cables in the same direction, the sub-cable cross-section model and the environmental cross-section model are spliced ​​together to obtain the environmental cable cross-section model of the parallel cables in the same direction.

[0017] Optionally, identifying the associated parameters of the parallel cables in the same direction based on the environmental cable cross-section model and the environmental impedance matrix includes:

[0018] Based on the environmental cable cross-section model and the environmental impedance matrix, the current transmission process of the parallel cable in the same direction is simulated using a unit current response strategy to obtain the simulated detection information of the parallel cable in the same direction.

[0019] Based on the simulated detection information, the relevant magnetic flux corresponding to each cable in the parallel cable is calculated, and based on the relevant magnetic flux corresponding to each cable, the total impedance matrix of the parallel cable is calculated through an algorithm optimization strategy.

[0020] The total impedance matrix is ​​used as the electromagnetic parameters of the parallel cable in the same direction, and the actual component information of each cable-related component of the parallel cable in the same direction is obtained.

[0021] Based on the actual component information of each of the cable association components, an association component model of each of the cable association components is constructed, and the component parameters corresponding to each association component model and the electromagnetic parameters of the body are used as the association parameters of the parallel cables in the same direction.

[0022] Optionally, the step of calculating the total impedance matrix of the parallel cables in the same direction based on the relevant magnetic flux corresponding to each of the cables, using an algorithm optimization strategy, includes:

[0023] For each cable, based on the relevant magnetic flux corresponding to the cable, the magnetic flux generated by the cable conductor and the magnetic flux linked between the cable conductor and other cable conductors are identified. Based on the magnetic flux generated by the cable conductor and the magnetic flux linked between the cable conductor and other cable conductors, the self-induced impedance matrix of the cable and the mutual induction impedance matrix between the cable and other cables are calculated.

[0024] Based on the self-induced impedance and each of the mutual inductance impedances, the self-impedance matrix of the cable is calculated, and the sub-impedance matrices of all cables are superimposed to obtain the total impedance matrix of the parallel cables in the same direction.

[0025] Optionally, constructing the full-circuit equivalent circuit model of the parallel cable in the same direction based on each of the associated parameters includes:

[0026] Obtain the electrical connection relationship between each of the cable-associated components and the parallel cable in the same direction, and based on the electrical connection relationship, connect the component parameters of each of the cable-associated components and the electromagnetic parameters of the parallel cable in the same direction in series to obtain the full-circuit equivalent circuit model of the parallel cable in the same direction.

[0027] Optionally, the step of identifying the current-carrying distribution information of the parallel cables in the same direction based on the equivalent circuit model of the entire line, and calculating the current-carrying imbalance of the parallel cables in the same direction based on the current-carrying distribution information, includes:

[0028] Obtain the current current value of each cable in the parallel cable in the same direction, and based on the current current value of each cable, identify the actual current distribution information of each cable through the equivalent circuit model of the whole line;

[0029] Based on the actual current distribution information of each cable, the sub-current imbalance of each cable is calculated using the current imbalance algorithm, and the sub-current imbalance of all cables is used as the current imbalance of the parallel cable in the same direction.

[0030] Secondly, this application also provides a device for calculating the current-carrying imbalance of a cable. The device includes:

[0031] The acquisition module is used to acquire various electrical parameters of the parallel cable in the same direction, the laying environment data of the parallel cable in the same direction, and the cable structure data of the parallel cable in the same direction, and to construct the environmental impedance matrix of the parallel cable in the same direction based on the electrical parameters.

[0032] The identification module is used to construct an environmental cable cross-section model of the parallel cable based on the laying environment data and the structural data of the parallel cable, and to identify the associated parameters of the parallel cable based on the environmental cable cross-section model and the environmental impedance matrix.

[0033] The construction module is used to construct the full-circuit equivalent circuit model of the parallel cable in the same direction based on the associated parameters.

[0034] The calculation module is used to identify the current-carrying distribution information of the parallel cable in the same direction based on the equivalent circuit model of the entire line, and to calculate the current-carrying imbalance of the parallel cable in the same direction based on the current-carrying distribution information.

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

[0036] Based on the electrical parameters, the impedance values ​​of each impedance type are identified, and based on the impedance values ​​of each impedance type, an initial impedance matrix of the parallel cable in the same direction is constructed; the impedance types include environmental impedance type and non-environmental impedance type;

[0037] Based on the impedance value of the environmental impedance type, the initial impedance matrix is ​​subjected to matrix transformation to obtain the impedance matrix of the parallel cable in the same direction, and the impedance matrix is ​​used as the environmental impedance matrix of the parallel cable in the same direction.

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

[0039] Based on the structural data of the parallel cable in the same direction, the structural parameters of each structural component of the parallel cable in the same direction are identified, and based on the laying environment data, the medium structure parameters of different environmental media are identified.

[0040] Based on the structural parameters of each structural component of the parallel cable, a sub-cable cross-section model of the parallel cable is constructed using a modeling program. Based on the dielectric structure parameters of each environmental medium, an environmental cross-section model of the parallel cable is constructed using the modeling program.

[0041] The relative positional relationship between the laying environment and the parallel cables in the same direction, as well as the relative positional relationship between each of the parallel cables in the same direction, is obtained. Based on the relative positional relationship between the laying environment and the parallel cables in the same direction, as well as the relative positional relationship between each of the parallel cables in the same direction, the sub-cable cross-section model and the environmental cross-section model are spliced ​​together to obtain the environmental cable cross-section model of the parallel cables in the same direction.

[0042] Optionally, the identification module is specifically used for:

[0043] Based on the environmental cable cross-section model and the environmental impedance matrix, the current transmission process of the parallel cable in the same direction is simulated using a unit current response strategy to obtain the simulated detection information of the parallel cable in the same direction.

[0044] Based on the simulated detection information, the relevant magnetic flux corresponding to each cable in the parallel cable is calculated, and based on the relevant magnetic flux corresponding to each cable, the total impedance matrix of the parallel cable is calculated through an algorithm optimization strategy.

[0045] The total impedance matrix is ​​used as the electromagnetic parameters of the parallel cable in the same direction, and the actual component information of each cable-related component of the parallel cable in the same direction is obtained.

[0046] Based on the actual component information of each of the cable association components, an association component model of each of the cable association components is constructed, and the component parameters corresponding to each association component model and the electromagnetic parameters of the body are used as the association parameters of the parallel cables in the same direction.

[0047] Optionally, the identification module is specifically used for:

[0048] For each cable, based on the relevant magnetic flux corresponding to the cable, the magnetic flux generated by the cable conductor and the magnetic flux linked between the cable conductor and other cable conductors are identified. Based on the magnetic flux generated by the cable conductor and the magnetic flux linked between the cable conductor and other cable conductors, the self-induced impedance matrix of the cable and the mutual induction impedance matrix between the cable and other cables are calculated.

[0049] Based on the self-induced impedance and each of the mutual inductance impedances, the self-impedance matrix of the cable is calculated, and the sub-impedance matrices of all cables are superimposed to obtain the total impedance matrix of the parallel cables in the same direction.

[0050] Optionally, the building module is specifically used for:

[0051] Obtain the electrical connection relationship between each of the cable-associated components and the parallel cable in the same direction, and based on the electrical connection relationship, connect the component parameters of each of the cable-associated components and the electromagnetic parameters of the parallel cable in the same direction in series to obtain the full-circuit equivalent circuit model of the parallel cable in the same direction.

[0052] Optionally, the computing module is specifically used for:

[0053] Obtain the current current value of each cable in the parallel cable in the same direction, and based on the current current value of each cable, identify the actual current distribution information of each cable through the equivalent circuit model of the whole line;

[0054] Based on the actual current distribution information of each cable, the sub-current imbalance of each cable is calculated using the current imbalance algorithm, and the sub-current imbalance of all cables is used as the current imbalance of the parallel cable in the same direction.

[0055] Thirdly, this application provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of the method described in any one of the first aspects.

[0056] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the steps of the method described in any one of the first aspects.

[0057] Fifthly, this application provides a computer program product. The computer program product includes a computer program that, when executed by a processor, implements the steps of the method described in any one of the first aspects.

[0058] The aforementioned method, apparatus, and computer equipment for calculating cable current imbalance involve acquiring various electrical parameters of a parallel cable in the same direction, data on the laying environment of the parallel cable, and data on the cable structure of the parallel cable in the same direction. Based on these electrical parameters, an environmental impedance matrix of the parallel cable in the same direction is constructed. Based on the laying environment data and the cable structure data, an environmental cable cross-section model of the parallel cable in the same direction is constructed. Based on the environmental cable cross-section model and the environmental impedance matrix, various associated parameters of the parallel cable in the same direction are identified. Based on these associated parameters, a full-circuit equivalent circuit model of the parallel cable in the same direction is constructed. Based on the full-circuit equivalent circuit model, the current-carrying distribution information of the parallel cable in the same direction is identified. Based on the current-carrying distribution information, the current-carrying imbalance of the parallel cable in the same direction is calculated. This scheme decomposes the cable transmission line into equivalent circuit models for the power source side, cable body, cable accessories, and load side in sequence. Parameters for the cable body are obtained through a two-dimensional field model, significantly reducing the complexity of field calculations while ensuring the accuracy of line parameters. Compared to traditional circuit models, it offers higher accuracy and higher computational efficiency. This scheme reduces the complexity of the finite element model, decreases computational complexity, and improves computational efficiency. By incorporating the field-circuit coupling concept, the final calculation is transformed into circuit model calculation, significantly shortening computation time while maintaining accuracy. Furthermore, this scheme requires no additional hardware, reducing system installation and maintenance costs and providing strong technical support for the safe and stable operation of power systems, thereby improving power system safety and operational efficiency. Attached Figure Description

[0059] Figure 1 This is a flowchart illustrating a method for calculating cable current-carrying imbalance in one embodiment.

[0060] Figure 2 This is a flowchart illustrating an example of calculating cable current-carrying imbalance in one embodiment.

[0061] Figure 3 This is a structural block diagram of a device for calculating the current-carrying imbalance of a cable in one embodiment;

[0062] Figure 4 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0064] The cable current-carrying imbalance calculation method provided in this application embodiment can be applied to the application environment of calculating the current-carrying imbalance of parallel cables of the same phase. This method can be applied to terminals, servers, or systems including both terminals and servers, and is implemented through interaction between the terminal and server. The terminal can be, but is not limited to, various personal computers, laptops, smartphones, tablets, etc. The terminal decomposes the cable transmission line into equivalent circuit models of the power supply side, cable body, cable accessories, and load side in sequence. The parameters of the cable body are obtained through a two-dimensional field model, greatly reducing the complexity of field calculations while ensuring the accuracy of line parameters. It has higher accuracy than traditional circuit models and higher computational efficiency than traditional numerical simulation calculation models. This solution reduces the complexity of the finite element model, decreases computational complexity, and improves computational efficiency. Combining the field-circuit coupling concept, the final calculation is transformed into circuit model calculation, which can significantly shorten the calculation time while ensuring calculation accuracy. Furthermore, this solution has no additional hardware requirements and does not require additional hardware equipment, reducing the system's installation and maintenance costs. It provides strong technical support for the safe and stable operation of power systems, thereby improving the safety and operational efficiency of power systems.

[0065] In one embodiment, such as Figure 1 As shown, a method for calculating cable current-carrying imbalance is provided. Taking the application of this method to a terminal as an example, the method includes the following steps:

[0066] Step S101: Obtain the electrical parameters of the parallel cable in the same direction, the laying environment data of the parallel cable in the same direction, and the cable structure data of the parallel cable in the same direction, and construct the environmental impedance matrix of the parallel cable in the same direction based on the electrical parameters.

[0067] In this embodiment, in response to the user's cable data upload operation, the terminal acquires the electrical parameters of the parallel cable in the same direction, which are actually measured by the user. These electrical parameters include the self-impedance Z of the parallel cable in the same direction. ii The mutual impedance Z influenced by other conductors (including other wire cores and metal shielding structures) ij Influence of the environment (the mutual inductance between the environment and various conductors Z) sj Z is The earth's own impedance Z within the return flow range ss ), which is generally represented by the impedance matrix parameter Z.

[0068]

[0069] In the formula, Z phase Z is the impedance matrix between 12×12 conductors. phase-earth and Zearth-phase Z represents the mutual impedance matrices between the environment and the conductor, which are 12×1 and 1×12 respectively. earth The environmental impedance is then determined. Based on various electrical parameters, the terminal constructs an environmental impedance matrix for the parallel cable in the same direction. The specific process of constructing the environmental impedance matrix will be explained in detail later. Next, the terminal acquires the laying environment data and cable structure data of the parallel cable in the same direction. The laying environment data includes, but is not limited to, environmental data corresponding to a three-layer medium laying environment of tunnel-soil-air. The cable structure data includes, but is not limited to, the layered cable body structure data of conductor-conductor shield-insulation layer-insulation shield-buffer layer-metal shield-outer sheath, and also includes material data for each part of the cable body.

[0070] Step S102: Based on the laying environment data and the structural data of the parallel cables in the same direction, construct an environmental cable cross-section model of the parallel cables in the same direction, and based on the environmental cable cross-section model and the environmental impedance matrix, identify the relevant parameters of the parallel cables in the same direction.

[0071] In this embodiment, the terminal constructs an environmental cable cross-section model of the parallel cable based on the laying environment data and the structural data of the parallel cable in the same direction, and identifies various related parameters of the parallel cable in the same direction based on the environmental cable cross-section model and the environmental impedance matrix. For example... Figure 2 The diagram shown is a visual representation of the constructed environmental cable cross-section model. This model includes the positional relationships of the parallel cables in the same direction, the cross-sectional model of each cable, and the environmental cross-sectional model of the environment in which the parallel cables are located. The specific construction process will be explained in detail later. Then, based on the environmental cable cross-section model and the environmental impedance matrix, the terminal identifies the associated parameters of the parallel cables in the same direction. These associated parameters include the electromagnetic parameters of the cable itself, the power parameters corresponding to the power supply model, the load parameters corresponding to the load model, and the accessory parameters corresponding to the cable's accessory information. The specific identification process will be explained in detail later.

[0072] Step S103: Based on the associated parameters, construct the full-circuit equivalent circuit model of the parallel cables in the same direction.

[0073] In this embodiment, the terminal constructs a full-circuit equivalent circuit model of the parallel cable in the same direction based on various associated parameters. This full-circuit equivalent circuit model is a current-carrying calculation model for the parallel cable in the same phase obtained by combining cable body parameters, power supply parameters, load parameters, and accessory parameters in series according to electrical connection relationships, such as... Figure 3 The diagram shows the equivalent circuit model of the entire line, which includes the circuit connections between cable-related accessories and cable conductors corresponding to each associated parameter. The specific construction process will be explained in detail later.

[0074] Step S104: Based on the equivalent circuit model of the entire line, identify the current-carrying distribution information of the parallel cables in the same direction, and calculate the current-carrying imbalance of the parallel cables in the same direction based on the current-carrying distribution information.

[0075] In this embodiment, the terminal identifies the current-carrying distribution information of the parallel cables in the same direction based on the equivalent circuit model of the entire line, and calculates the current-carrying imbalance of the parallel cables in the same direction based on the current-carrying distribution information. The specific calculation process will be explained in detail later.

[0076] Based on the above scheme, by decomposing the cable transmission line into the power source side, cable body, cable accessories, and load side and performing equivalent circuit modeling in sequence, the parameters of the cable body are obtained through a two-dimensional field model, which greatly reduces the complexity of field calculations while ensuring the accuracy of line parameters. This scheme achieves higher accuracy than traditional circuit models and higher computational efficiency than traditional numerical simulation models. This scheme reduces the complexity of the finite element model, decreases computational complexity, and improves computational efficiency. Combining the field-circuit coupling concept, the final calculation is transformed into circuit model calculation, which significantly shortens the calculation time while maintaining computational accuracy. Furthermore, this scheme requires no additional hardware, reducing system installation and maintenance costs and providing strong technical support for the safe and stable operation of power systems, thereby improving the safety and operational efficiency of power systems.

[0077] Optionally, based on various electrical parameters, an environmental impedance matrix for the parallel cable in the same direction is constructed, including: identifying the impedance values ​​of each impedance type based on various electrical parameters, and constructing an initial impedance matrix for the parallel cable in the same direction based on the impedance values ​​of each impedance type; the impedance types include environmental impedance types and non-environmental impedance types; performing matrix transformation on the initial impedance matrix based on the impedance values ​​of the environmental impedance types to obtain the impedance matrix of the parallel cable in the same direction, and using the impedance matrix as the environmental impedance matrix of the parallel cable in the same direction.

[0078] In this embodiment, the terminal identifies the impedance values ​​of each impedance type based on various electrical parameters, and constructs an initial impedance matrix for the parallel cables in the same direction based on the impedance values ​​of each impedance type. The impedance types include environmental impedance types and non-environmental impedance types. Specifically, the environmental impedance types include environmental self-impedance types and mutual impedance types between the environment and the conductor; the non-environmental impedance types include mutual impedances influenced by other conductors of the cable (including other wire cores and metal shielding structures), and the self-impedance of the parallel cables in the same direction.

[0079] At the terminal, based on the impedance value of the environmental impedance type, the initial impedance matrix is ​​transformed to obtain the impedance matrix of the parallel cable in the same direction, and the impedance matrix is ​​used as the environmental impedance matrix of the parallel cable in the same direction.

[0080] Specifically, the terminal uses matrix transformation to decouple the environmental influences to obtain a new 12×12 impedance matrix Z', and the transformation formula is as follows:

[0081]

[0082] In the above formula, Z phase Z is the impedance matrix between 12×12 conductors. phase-earth and Z earth-phase Z represents the mutual impedance matrices between the environment and the conductor, which are 12×1 and 1×12 respectively. earth Environmental self-impedance

[0083] Based on the above scheme, the environmental influence is decoupled through matrix transformation, so that the obtained environmental impedance matrix is ​​a mathematical model of the electromagnetic induction of the cable body after eliminating the influence of the laying environment, thereby improving the accuracy of identifying the impedance information of parallel cables in the same direction.

[0084] Optionally, based on the laying environment data and the structural data of the parallel cables in the same direction, an environmental cable cross-section model of the parallel cables in the same direction is constructed, including: identifying the structural parameters of each structural component of the parallel cables in the same direction based on the structural data of the parallel cables in the same direction, and identifying the medium structural parameters of different environmental media based on the laying environment data; constructing the sub-cable cross-section model of the parallel cables in the same direction based on the structural parameters of each structural component of the parallel cables in the same direction through a modeling program, and constructing the environmental cross-section model of the parallel cables in the same direction based on the medium structural parameters of each environmental medium through a modeling program; obtaining the relative positional relationship between the laying environment and the parallel cables in the same direction, as well as the relative positional relationship between each parallel cable in the same direction, and splicing the sub-cable cross-section model and the environmental cross-section model based on the relative positional relationship between the laying environment and the parallel cables in the same direction, as well as the relative positional relationship between each parallel cable in the same direction, to obtain the cable cross-section model of the parallel cables in the same direction.

[0085] In this embodiment, the terminal identifies the structural parameters of each component of the parallel cable based on the structural data of the parallel cable, and identifies the medium structural parameters of different environmental media based on the laying environment data. These different environmental media include a three-layer environment of tunnel-soil-air. Then, based on the structural parameters of each component of the parallel cable, the terminal constructs a sub-cable cross-section model of the parallel cable using a modeling program, and constructs an environmental cross-section model of the parallel cable based on the medium structural parameters of each environmental medium. The constructed cross-section models are finite element models of the coupled electromagnetic field and circuit modules constructed by the terminal using a finite element simulation program.

[0086] Then, the terminal obtains the relative positional relationship between the laying environment and the parallel cables in the same direction, as well as the relative positional relationship between each parallel cable in the same direction. Based on the relative positional relationship between the laying environment and the parallel cables in the same direction, as well as the relative positional relationship between each parallel cable in the same direction, the sub-cable cross-section model and the environmental cross-section model are spliced ​​together to obtain the environmental cable cross-section model of the parallel cables in the same direction.

[0087] Based on the above scheme, a cable cross-section model of the parallel cable in the same direction is constructed by using laying environment data and structural data of parallel cables in the same direction, thereby improving the accuracy of the constructed model.

[0088] Optionally, based on the environmental cable cross-section model and the environmental impedance matrix, the associated parameters of the parallel cables in the same direction are identified, including: based on the environmental cable cross-section model and the environmental impedance matrix, simulating the current transmission process of the parallel cables in the same direction using a unit current response strategy to obtain the simulated detection information of the parallel cables in the same direction; based on the simulated detection information, calculating the relevant magnetic flux corresponding to each cable in the parallel cables in the same direction, and based on the relevant magnetic flux corresponding to each cable, calculating the total impedance matrix of the parallel cables in the same direction using an algorithm optimization strategy; using the total impedance matrix as the body electromagnetic parameters of the parallel cables in the same direction, and obtaining the actual component information of each cable-related component of the parallel cables in the same direction; based on the actual component information of each cable-related component, constructing the associated component model of each cable-related component, and using the component parameters and body electromagnetic parameters corresponding to each associated component model as the associated parameters of the parallel cables in the same direction.

[0089] In this embodiment, the terminal, based on the environmental cable cross-section model and the environmental impedance matrix, simulates the current transmission process of parallel cables in the same direction using a unit current response strategy to obtain simulated detection information of the parallel cables. The unit current response strategy involves applying a unit current to one cable in the parallel cables to identify the magnetic flux information of the other parallel cables. Then, based on the simulated detection information, the terminal calculates the relevant magnetic flux corresponding to each cable in the parallel cables, and based on the relevant magnetic flux corresponding to each cable, calculates the total impedance matrix of the parallel cables in the same direction using an algorithm optimization strategy. The relevant magnetic flux includes the magnetic flux generated by the cable conductors and the magnetic flux linked between the cable conductors and other cable conductors. The specific process of calculating the total impedance matrix will be explained in detail later. Then, the terminal uses the total impedance matrix as the body electromagnetic parameters of the parallel cables in the same direction and obtains the actual component information of each cable-related component. This actual component information includes power information, cable-related accessory information, and cable power flow information. Finally, based on the actual component information of each cable-related component, the terminal constructs a related component model of each cable-related assembly.

[0090] Specifically, the terminal acquires power information, cable-related accessory information, and cable power flow information, and then sets a non-ideal power supply model. The power supply model can be set as a model of an ideal voltage source series impedance; the phase angle and amplitude of the three-phase power supply can be adjusted according to actual conditions. The terminal sets a load model for power flow control. The load model adopts a constant power model, assuming the power flow at the load is S, with a power factor of cosφ, then its equivalent load impedance (R) is... L +jX L The calculation formula is as follows:

[0091]

[0092]

[0093] The equivalent circuit model of the cable accessories is constructed. The cable accessories mainly include intermediate joints and terminations. For intermediate joints, a contact coefficient k is introduced to describe their contact resistance R. s1 The size, and the corresponding formula are as follows:

[0094] R S1 =kR

[0095] In the above formula, R represents the unit resistance of the body. For the terminal, the metal shielding layer is generally grounded. The two metal shielding wires of the same phase are usually connected in parallel through the connection terminal, and then grounded, with the grounding resistance set to R. s2 Its range is generally less than 4Ω.

[0096] Finally, the terminal uses the component parameters corresponding to each associated component model, as well as the electromagnetic parameters of the main body, as the associated parameters of the parallel cable in the same direction.

[0097] Based on the above scheme, by constructing an environmental cable cross-section model and an environmental impedance matrix, the electrical circuit parameters of the cable body, cable accessories, power supply side, and load side are solved respectively, thereby improving the accuracy of the calculated parameters.

[0098] Optionally, based on the relevant magnetic flux of each cable, the total impedance matrix of the parallel cables in the same direction is calculated using an algorithm optimization strategy. This includes: for each cable, based on the relevant magnetic flux of the cable, identifying the magnetic flux generated by the cable conductor and the magnetic flux linked between the cable conductor and other cable conductors; and based on the magnetic flux generated by the cable conductor and the magnetic flux linked between the cable conductor and other cable conductors, calculating the self-induced impedance matrix of the cable and the mutual induced impedance matrix between the cable and other cables; based on the self-induced impedance and each mutual induced impedance, calculating the self-impedance matrix of the cable, and performing impedance superposition processing on the sub-impedance matrices of all cables to obtain the total impedance matrix of the parallel cables in the same direction.

[0099] In this embodiment, for each cable, the terminal identifies the magnetic flux generated by the cable conductor and the magnetic flux linked between the cable conductor and other cable conductors based on the relevant magnetic flux of the cable. Based on the magnetic flux generated by the cable conductor and the magnetic flux linked between the cable conductor and other cable conductors, the terminal calculates the self-induced impedance matrix of the cable and the mutual induced impedance matrix between the cable and other cables. Then, based on the self-induced impedance and each mutual induced impedance, the terminal calculates the self-impedance matrix of the cable and performs impedance superposition processing on the sub-impedance matrices of all cables to obtain the total impedance matrix of the parallel cables in the same direction.

[0100] Specifically, based on the environmental cable cross-section model and the environmental impedance matrix, the cable body satisfies the following current-voltage characteristic equation:

[0101] U Phase =Z′I Phase

[0102] In the above formula, U P This is a 12×1 phase voltage matrix, representing the voltage across each sub-cable core and the voltage across the metal shield. Similarly, I P It is also a 12×1 phase current matrix, representing the current of each sub-cable core and the current of the metal shielding layer, and Z' is the environmental impedance matrix.

[0103] Then, the terminal uses the unit current response method, applying a unit current source to each conductor one by one, and solving for the magnetic flux response Φ of each conductor at a 50Hz power frequency. P The mutual inductance matrix is ​​calculated as follows:

[0104] Z mutual =Φ P I -1

[0105] Among them, the self-impedance Z of the parallel cable body obtained in step S101 is... self Then the total impedance matrix of the cable body is:

[0106] Z′=Z mutual +Z self

[0107] Based on the above scheme, by combining the unit current response strategy and the environmental impedance matrix, the total impedance matrix of the cable body is analyzed, which avoids [further problems] and improves the efficiency and accuracy of the analysis.

[0108] Optionally, based on each associated parameter, a full-circuit equivalent circuit model of the parallel cable in the same direction is constructed, including: obtaining the electrical connection relationship between each cable associated component and the parallel cable in the same direction, and based on the electrical connection relationship, connecting the component parameters of each cable associated component and the electromagnetic parameters of the parallel cable in the same direction in series to obtain the full-circuit equivalent circuit model of the parallel cable in the same direction.

[0109] In this embodiment, the terminal acquires the electrical connection relationships between each cable-associated component and the parallel cable in the same direction. Based on these electrical connection relationships, the component parameters of each cable-associated component and the electromagnetic parameters of the parallel cable in the same direction are connected in series to obtain the equivalent circuit model of the entire parallel cable. The electrical connection relationships between each cable-associated component and the parallel cable in the same direction include the electrical connection relationships between the power supply and each cable of the parallel cable, the electrical connection relationships between the cable's related accessories and each cable of the parallel cable, and the electrical connection relationships between the cable's load module and each cable of the parallel cable.

[0110] Based on the above scheme, by decomposing the cable transmission line into the power supply side, cable body, cable accessories and load side in sequence and performing equivalent circuit modeling, the parameters of the cable body are obtained through two-dimensional field model processing, which greatly reduces the complexity of field calculation, while ensuring the accuracy of line parameters. It has higher accuracy than traditional road models and higher computational efficiency than traditional numerical simulation calculation models.

[0111] Optionally, based on the full-line equivalent circuit model, the current-carrying distribution information of the parallel cables in the same direction is identified, and based on the current-carrying distribution information, the current-carrying imbalance of the parallel cables in the same direction is calculated, including: obtaining the current value of each cable in the parallel cables in the same direction, and based on the current value of each cable, identifying the actual current distribution information of each cable through the full-line equivalent circuit model; based on the actual current distribution information of each cable, calculating the sub-current-carrying imbalance of each cable through the current-carrying imbalance algorithm, and taking the sub-current-carrying imbalance of all cables as the current-carrying imbalance of the parallel cables in the same direction.

[0112] In this embodiment, the terminal acquires the current current value of each cable in the parallel cable in the same direction, and based on the current current value of each cable, identifies the actual current distribution information of each cable through the equivalent circuit model of the entire line. The actual current distribution information of the ground cable is the actual current magnitude of each phase cable. The current current value of each cable is the loaded current value of the cable in each phase.

[0113] Based on the actual current distribution information of each cable, the terminal calculates the sub-current imbalance of each cable using a current imbalance algorithm, and uses the sub-current imbalance of all cables as the current imbalance of the parallel cables in the same direction.

[0114] The calculation formula for the current imbalance algorithm is shown below:

[0115]

[0116]

[0117]

[0118] In the formula, I A1 I A2 I represents the current magnitude of each sub-cable of A; B1 I B2 The magnitude of the current in each sub-cable of phase B; I C1 I C2 This represents the current magnitude of each sub-cable in phase C.

[0119] Based on the above scheme, the algorithm that characterizes the current distribution imbalance by calculating the current difference between two sub-cables as a function of the sum of currents is more intuitive and clear than the traditional imbalance calculation method. Moreover, the calculation efficiency is higher while ensuring the accuracy of the calculation.

[0120] This application also provides an example of calculating the current-carrying imbalance of a cable, such as... Figure 2 As shown, the specific processing procedure includes the following steps:

[0121] Step S201: Obtain the electrical parameters of the parallel cables in the same direction, the laying environment data of the parallel cables in the same direction, and the cable structure data of the parallel cables in the same direction.

[0122] Step S202: Based on each electrical parameter, identify the impedance value of each impedance type, and construct the initial impedance matrix of the parallel cables in the same direction based on the impedance value of each impedance type; the impedance types include environmental impedance type and non-environmental impedance type.

[0123] Step S203: Based on the impedance value of the environmental impedance type, perform matrix transformation on the initial impedance matrix to obtain the impedance matrix of the parallel cable in the same direction, and use the impedance matrix as the environmental impedance matrix of the parallel cable in the same direction.

[0124] Step S204: Based on the structural data of the parallel cable in the same direction, identify the structural parameters of each structural component of the parallel cable in the same direction, and based on the laying environment data, identify the medium structural parameters of different environmental media.

[0125] Step S205: Based on the structural parameters of each structural component of the parallel cable, construct the sub-cable cross-section model of the parallel cable using a modeling program, and based on the dielectric structure parameters of each environmental medium, construct the environmental cross-section model of the parallel cable using a modeling program.

[0126] Step S206: Obtain the relative positional relationship between the laying environment and the parallel cables in the same direction, as well as the relative positional relationship between each parallel cable in the same direction. Based on the relative positional relationship between the laying environment and the parallel cables in the same direction, as well as the relative positional relationship between each parallel cable in the same direction, splice the sub-cable cross-section model and the environmental cross-section model to obtain the environmental cable cross-section model of the parallel cables in the same direction.

[0127] Step S207: Based on the environmental cable cross-section model and the environmental impedance matrix, the current transmission process of the parallel cable in the same direction is simulated through the unit current response strategy to obtain the simulation detection information of the parallel cable in the same direction.

[0128] Step S208: Based on the simulation detection information, calculate the relevant magnetic flux of each cable in the parallel cable in the same direction.

[0129] Step S209: For each cable, based on the relevant magnetic flux corresponding to the cable, identify the magnetic flux generated by the cable conductor and the magnetic flux linked between the cable conductor and other cable conductors, and calculate the self-induced impedance matrix of the cable and the mutual induction impedance matrix between the cable and other cables based on the magnetic flux generated by the cable conductor and the magnetic flux linked between the cable conductor and other cable conductors.

[0130] Step S210: Based on the self-induced impedance and each mutual inductance impedance, calculate the self-impedance matrix of the cable, and perform impedance superposition processing on the sub-impedance matrices of all cables to obtain the total impedance matrix of the parallel cables in the same direction.

[0131] Step S211: Use the total impedance matrix as the electromagnetic parameters of the parallel cable in the same direction, and obtain the actual component information of each cable-related component of the parallel cable in the same direction.

[0132] Step S212: Based on the actual component information of each cable association component, construct the association component model of each cable association assembly, and use the component parameters and the body electromagnetic parameters corresponding to each association component model as the association parameters of the parallel cables in the same direction.

[0133] Step S213: Obtain the electrical connection relationship between each cable-related component and the parallel cable in the same direction, and based on the electrical connection relationship, connect the component parameters of each cable-related component and the electromagnetic parameters of the parallel cable in the same direction in series to obtain the full-line equivalent circuit model of the parallel cable in the same direction.

[0134] Step S214: Obtain the current current value of each cable in the parallel cable in the same direction, and based on the current current value of each cable, identify the actual current distribution information of each cable through the equivalent circuit model of the whole line.

[0135] Step S215: Based on the actual current distribution information of each cable, calculate the sub-current imbalance of each cable using the current imbalance algorithm, and take the sub-current imbalance of all cables as the current imbalance of the parallel cables in the same direction.

[0136] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0137] Based on the same inventive concept, this application also provides a cable current-carrying imbalance calculation device for implementing the cable current-carrying imbalance calculation method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations of one or more cable current-carrying imbalance calculation device embodiments provided below can be found in the limitations of the cable current-carrying imbalance calculation method described above, and will not be repeated here.

[0138] In one embodiment, such as Figure 3 As shown, a device for calculating cable current-carrying imbalance is provided, comprising: an acquisition module 310, an identification module 320, a construction module 330, and a calculation module 340, wherein:

[0139] The acquisition module 310 is used to acquire various electrical parameters of the parallel cable in the same direction, the laying environment data of the parallel cable in the same direction, and the cable structure data of the parallel cable in the same direction, and to construct the environmental impedance matrix of the parallel cable in the same direction based on the electrical parameters.

[0140] The identification module 320 is used to construct an environmental cable cross-section model of the parallel cable based on the laying environment data and the structural data of the parallel cable, and to identify the associated parameters of the parallel cable based on the environmental cable cross-section model and the environmental impedance matrix.

[0141] The construction module 330 is used to construct the full-circuit equivalent circuit model of the parallel cable in the same direction based on the associated parameters.

[0142] The calculation module 340 is used to identify the current-carrying distribution information of the parallel cable in the same direction based on the equivalent circuit model of the entire line, and to calculate the current-carrying imbalance of the parallel cable in the same direction based on the current-carrying distribution information.

[0143] Optionally, the acquisition module 310 is specifically used for:

[0144] Based on the electrical parameters, the impedance values ​​of each impedance type are identified, and based on the impedance values ​​of each impedance type, an initial impedance matrix of the parallel cable in the same direction is constructed; the impedance types include environmental impedance type and non-environmental impedance type;

[0145] Based on the impedance value of the environmental impedance type, the initial impedance matrix is ​​subjected to matrix transformation to obtain the impedance matrix of the parallel cable in the same direction, and the impedance matrix is ​​used as the environmental impedance matrix of the parallel cable in the same direction.

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

[0147] Based on the structural data of the parallel cable in the same direction, the structural parameters of each structural component of the parallel cable in the same direction are identified, and based on the laying environment data, the medium structure parameters of different environmental media are identified.

[0148] Based on the structural parameters of each structural component of the parallel cable, a sub-cable cross-section model of the parallel cable is constructed using a modeling program. Based on the dielectric structure parameters of each environmental medium, an environmental cross-section model of the parallel cable is constructed using the modeling program.

[0149] The relative positional relationship between the laying environment and the parallel cables in the same direction, as well as the relative positional relationship between each of the parallel cables in the same direction, is obtained. Based on the relative positional relationship between the laying environment and the parallel cables in the same direction, as well as the relative positional relationship between each of the parallel cables in the same direction, the sub-cable cross-section model and the environmental cross-section model are spliced ​​together to obtain the environmental cable cross-section model of the parallel cables in the same direction.

[0150] Optionally, the identification module 320 is specifically used for:

[0151] Based on the environmental cable cross-section model and the environmental impedance matrix, the current transmission process of the parallel cable in the same direction is simulated using a unit current response strategy to obtain the simulated detection information of the parallel cable in the same direction.

[0152] Based on the simulated detection information, the relevant magnetic flux corresponding to each cable in the parallel cable is calculated, and based on the relevant magnetic flux corresponding to each cable, the total impedance matrix of the parallel cable is calculated through an algorithm optimization strategy.

[0153] The total impedance matrix is ​​used as the electromagnetic parameters of the parallel cable in the same direction, and the actual component information of each cable-related component of the parallel cable in the same direction is obtained.

[0154] Based on the actual component information of each of the cable association components, an association component model of each of the cable association components is constructed, and the component parameters corresponding to each association component model and the electromagnetic parameters of the body are used as the association parameters of the parallel cables in the same direction.

[0155] Optionally, the identification module 320 is specifically used for:

[0156] For each cable, based on the relevant magnetic flux corresponding to the cable, the magnetic flux generated by the cable conductor and the magnetic flux linked between the cable conductor and other cable conductors are identified. Based on the magnetic flux generated by the cable conductor and the magnetic flux linked between the cable conductor and other cable conductors, the self-induced impedance matrix of the cable and the mutual induction impedance matrix between the cable and other cables are calculated.

[0157] Based on the self-induced impedance and each of the mutual inductance impedances, the self-impedance matrix of the cable is calculated, and the sub-impedance matrices of all cables are superimposed to obtain the total impedance matrix of the parallel cables in the same direction.

[0158] Optionally, the building module 330 is specifically used for:

[0159] Obtain the electrical connection relationship between each of the cable-associated components and the parallel cable in the same direction, and based on the electrical connection relationship, connect the component parameters of each of the cable-associated components and the electromagnetic parameters of the parallel cable in the same direction in series to obtain the full-circuit equivalent circuit model of the parallel cable in the same direction.

[0160] Optionally, the computing module 340 is specifically used for:

[0161] Obtain the current current value of each cable in the parallel cable in the same direction, and based on the current current value of each cable, identify the actual current distribution information of each cable through the equivalent circuit model of the whole line;

[0162] Based on the actual current distribution information of each cable, the sub-current imbalance of each cable is calculated using the current imbalance algorithm, and the sub-current imbalance of all cables is used as the current imbalance of the parallel cable in the same direction.

[0163] Each module in the aforementioned cable current-carrying imbalance calculation device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the computer device's memory as software, so that the processor can call and execute the operations corresponding to each module.

[0164] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 4 As shown, the computer device includes a processor, memory, communication interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When executed by the processor, the computer program implements a method for calculating cable current imbalance. The display screen can be an LCD screen or an e-ink screen. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad mounted on the computer device casing, or an external keyboard, touchpad, or mouse.

[0165] Those skilled in the art will understand that Figure 4 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0166] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the method described in any one of the first aspects.

[0167] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described in any one of the first aspects.

[0168] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of the method described in any one of the first aspects.

[0169] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0170] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0171] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0172] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for calculating the current-carrying imbalance of a cable, characterized in that, The method includes: Obtain the electrical parameters of the parallel cable in the same direction, the laying environment data of the parallel cable in the same direction, and the cable structure data of the parallel cable in the same direction; Based on the electrical parameters, the impedance values ​​of each impedance type are identified, and based on the impedance values ​​of each impedance type, an initial impedance matrix of the parallel cable in the same direction is constructed; the impedance types include environmental impedance type and non-environmental impedance type; Based on the impedance value of the environmental impedance type, the initial impedance matrix is ​​subjected to matrix transformation to obtain the impedance matrix of the parallel cable in the same direction, and the impedance matrix is ​​used as the environmental impedance matrix of the parallel cable in the same direction. Based on the laying environment data and the structural data of the parallel cable in the same direction, an environmental cable cross-section model of the parallel cable in the same direction is constructed, and based on the environmental cable cross-section model and the environmental impedance matrix, the associated parameters of the parallel cable in the same direction are identified. Obtain the electrical connection relationship between each of the cable-associated components and the parallel cable in the same direction, and based on the electrical connection relationship, connect the component parameters of each of the cable-associated components and the electromagnetic parameters of the parallel cable in the same direction in series to obtain the full-circuit equivalent circuit model of the parallel cable in the same direction. Obtain the current current value of each cable in the parallel cable in the same direction, and based on the current current value of each cable, identify the actual current distribution information of each cable through the equivalent circuit model of the whole line; Based on the actual current distribution information of each cable, the sub-current imbalance of each cable is calculated using the current imbalance algorithm, and the sub-current imbalance of all cables is used as the current imbalance of the parallel cable in the same direction.

2. The method according to claim 1, characterized in that, The step of constructing an environmental cable cross-section model of the parallel cable based on the laying environment data and the structural data of the parallel cable in the same direction includes: Based on the structural data of the parallel cable in the same direction, the structural parameters of each structural component of the parallel cable in the same direction are identified, and based on the laying environment data, the medium structure parameters of different environmental media are identified. Based on the structural parameters of each structural component of the parallel cable, a sub-cable cross-section model of the parallel cable is constructed using a modeling program. Based on the dielectric structure parameters of each environmental medium, an environmental cross-section model of the parallel cable is constructed using the modeling program. The relative positional relationship between the laying environment and the parallel cables in the same direction, as well as the relative positional relationship between each of the parallel cables in the same direction, is obtained. Based on the relative positional relationship between the laying environment and the parallel cables in the same direction, as well as the relative positional relationship between each of the parallel cables in the same direction, the sub-cable cross-section model and the environmental cross-section model are spliced ​​together to obtain the environmental cable cross-section model of the parallel cables in the same direction.

3. The method according to claim 1, characterized in that, The identification of the associated parameters of the parallel cables in the same direction based on the environmental cable cross-section model and the environmental impedance matrix includes: Based on the environmental cable cross-section model and the environmental impedance matrix, the current transmission process of the parallel cable in the same direction is simulated using a unit current response strategy to obtain the simulated detection information of the parallel cable in the same direction. Based on the simulated detection information, the relevant magnetic flux corresponding to each cable in the parallel cable is calculated, and based on the relevant magnetic flux corresponding to each cable, the total impedance matrix of the parallel cable is calculated through an algorithm optimization strategy. The total impedance matrix is ​​used as the electromagnetic parameters of the parallel cable in the same direction, and the actual component information of each cable-related component of the parallel cable in the same direction is obtained. Based on the actual component information of each of the cable association components, an association component model of each of the cable association components is constructed, and the component parameters corresponding to each association component model and the electromagnetic parameters of the body are used as the association parameters of the parallel cables in the same direction.

4. The method according to claim 1, characterized in that, The calculation of the total impedance matrix of the parallel cables in the same direction, based on the relevant magnetic flux of each cable and through an algorithm optimization strategy, includes: For each cable, based on the relevant magnetic flux corresponding to the cable, the magnetic flux generated by the cable conductor and the magnetic flux linked between the cable conductor and other cable conductors are identified. Based on the magnetic flux generated by the cable conductor and the magnetic flux linked between the cable conductor and other cable conductors, the self-induced impedance matrix of the cable and the mutual induction impedance matrix between the cable and other cables are calculated. Based on the self-induced impedance and each of the mutual inductance impedances, the self-impedance matrix of the cable is calculated, and the sub-impedance matrices of all cables are superimposed to obtain the total impedance matrix of the parallel cables in the same direction.

5. A device for calculating the current-carrying imbalance of a cable, characterized in that, The device includes: An acquisition module is used to acquire various electrical parameters of the parallel cable in the same direction, the laying environment data of the parallel cable in the same direction, and the cable structure data of the parallel cable in the same direction; based on the electrical parameters, it identifies the impedance values ​​of each impedance type, and constructs an initial impedance matrix of the parallel cable in the same direction based on the impedance values ​​of each impedance type; the impedance types include environmental impedance types and non-environmental impedance types; based on the impedance values ​​of the environmental impedance types, it performs matrix transformation processing on the initial impedance matrix to obtain the impedance matrix of the parallel cable in the same direction, and uses the impedance matrix as the environmental impedance matrix of the parallel cable in the same direction. The identification module is used to construct an environmental cable cross-section model of the parallel cable based on the laying environment data and the structural data of the parallel cable, and to identify the associated parameters of the parallel cable based on the environmental cable cross-section model and the environmental impedance matrix. A construction module is used to obtain the electrical connection relationship between each of the cable-associated components and the parallel cable in the same direction, and based on the electrical connection relationship, to connect the component parameters of each of the cable-associated components and the electromagnetic parameters of the parallel cable in the same direction in series to obtain the full-circuit equivalent circuit model of the parallel cable in the same direction. The calculation module is used to obtain the current current value of each cable in the parallel cable in the same direction, and based on the current current value of each cable, identify the actual current distribution information of each cable through the equivalent circuit model of the whole line; based on the actual current distribution information of each cable, calculate the sub-current imbalance of each cable through the current imbalance algorithm, and take the sub-current imbalance of all cables as the current imbalance of the parallel cable in the same direction.

6. The apparatus according to claim 5, characterized in that, The identification module is specifically used for: Based on the structural data of the parallel cable in the same direction, the structural parameters of each structural component of the parallel cable in the same direction are identified, and based on the laying environment data, the medium structure parameters of different environmental media are identified. Based on the structural parameters of each structural component of the parallel cable, a sub-cable cross-section model of the parallel cable is constructed using a modeling program. Based on the dielectric structure parameters of each environmental medium, an environmental cross-section model of the parallel cable is constructed using the modeling program. The relative positional relationship between the laying environment and the parallel cables in the same direction, as well as the relative positional relationship between each of the parallel cables in the same direction, is obtained. Based on the relative positional relationship between the laying environment and the parallel cables in the same direction, as well as the relative positional relationship between each of the parallel cables in the same direction, the sub-cable cross-section model and the environmental cross-section model are spliced ​​together to obtain the environmental cable cross-section model of the parallel cables in the same direction.

7. The apparatus according to claim 5, characterized in that, The identification module is specifically used for: Based on the environmental cable cross-section model and the environmental impedance matrix, the current transmission process of the parallel cable in the same direction is simulated using a unit current response strategy to obtain the simulated detection information of the parallel cable in the same direction. Based on the simulated detection information, the relevant magnetic flux corresponding to each cable in the parallel cable is calculated, and based on the relevant magnetic flux corresponding to each cable, the total impedance matrix of the parallel cable is calculated through an algorithm optimization strategy. The total impedance matrix is ​​used as the electromagnetic parameters of the parallel cable in the same direction, and the actual component information of each cable-related component of the parallel cable in the same direction is obtained. Based on the actual component information of each of the cable association components, an association component model of each of the cable association components is constructed, and the component parameters corresponding to each association component model and the electromagnetic parameters of the body are used as the association parameters of the parallel cables in the same direction.

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

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

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

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