Method and device for adjusting current-carrying unbalance degree of cable and computer equipment

Abstract

The invention relates to a cable current-carrying unbalance degree adjusting method and device and computer equipment. The method comprises the following steps: acquiring electrical parameters of each phase and current current-carrying data of the same-direction parallel cables, and constructing an equivalent mathematical model of the same-direction parallel cables based on the electrical parameters of each phase; based on the equivalent mathematical model, identifying an impedance matrix of the same-direction parallel cables, and based on the impedance matrix, identifying an adjustment strategy and an alarm value of the cable current-carrying unbalance degree of the same-direction parallel cables; and based on the adjustment strategy, identifying an association relationship between the electrical parameters of each phase of the same-direction parallel cable and the current-carrying unbalance degree, and when the current-carrying unbalance degree corresponding to the current current-carrying data exceeds an alarm value, adjusting the electrical parameters of each phase of the same-direction parallel cable based on the association relationship so as to adjust the current-carrying unbalance degree of each phase of the same-direction parallel cable. And obtaining the target same-direction parallel cable. By adopting the method, the efficiency of limiting the current-carrying unbalance degree of the cable can be improved.

Description

Technical Field

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

[0002] In recent years, the average annual growth rate of the length of urban AC power cables has reached 35%. Cable lines have long become the main channel for urban power transmission. Overhead transmission lines in cities are gradually replaced by parallel cable lines in the same direction. However, in parallel cable lines in the same direction, there are complex electromagnetic connections between the sub-cables, which leads to unbalanced electrical parameters, and then leads to unbalanced current carrying capacity of parallel cable lines in the same direction. This will not only greatly reduce the overall transmission capacity of parallel cable lines in the same direction, but also cause serious accidents such as overheating and breakdown of some cables during actual operation. Therefore, limiting the current carrying imbalance of cables is the current research focus.

[0003] The traditional way to limit the current imbalance of cables is through load balancing, selecting cables of the same model with the same electrical parameters, and regular maintenance to ensure consistent contact resistance. However, the above methods are costly and have a limited range of limiting the current imbalance, resulting in low efficiency in limiting the current imbalance of 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 adjusting cable current imbalance in order to solve the above technical problems.

[0005] In a first aspect, the present application provides a method for adjusting cable current imbalance, comprising:

[0006] Acquire the electrical parameters of each phase of the parallel cables in the same direction and the current current carrying data of the parallel cables in the same direction, and construct an equivalent mathematical model of the parallel cables in the same direction based on the electrical parameters of each phase;

[0007] Based on the equivalent mathematical model, an impedance matrix of the parallel cables in the same direction is identified, and based on the impedance matrix, a regulation strategy for the cable current unbalance of the parallel cables in the same direction and a warning value for the current unbalance of the parallel cables in the same direction are identified;

[0008] Based on the adjustment strategy, the correlation between the electrical parameters of each phase of the same-direction parallel cable and the current imbalance is identified, and when the current imbalance corresponding to the current current data exceeds the warning value, the electrical parameters of each phase of the same-direction parallel cable are adjusted based on the correlation to obtain the target same-direction parallel cable.

[0009] Optionally, constructing an equivalent mathematical model of the co-directional parallel cables based on the electrical parameters of each phase includes:

[0010] For each phase, based on the electrical parameters of the phase, identifying the electrical parameter values ​​of each parameter type, and constructing a sub-equivalent mathematical model of the phase based on the electrical parameter values ​​of each parameter type;

[0011] The sub-equivalent mathematical models of all phases are used as the equivalent mathematical models of the same-direction parallel cables.

[0012] Optionally, the identifying the impedance matrix of the co-directional parallel cables based on the equivalent mathematical model includes:

[0013] Based on the sub-equivalent mathematical model of each phase, identifying each impedance influence data of each phase, and calculating the self-impedance information of each phase based on the each impedance influence data of each phase;

[0014] Identify the relative position information of the cables of each phase, and based on the relative position information of the cables of each phase, identify the mutual impedance information between the phases;

[0015] Based on the self-impedance information of each of the phases and the mutual impedance information between the phases, an impedance matrix of the parallel cables in the same direction is identified.

[0016] Optionally, the identifying, based on the impedance matrix, a regulation strategy for cable current unbalance of the co-directional parallel cables and a warning value for the current unbalance of the co-directional parallel cables comprises:

[0017] Based on the impedance matrix, a first current unbalance degree of the co-directional parallel cables is calculated, and the electrical parameter values ​​of each preset parameter type are adjusted respectively through a preset adjustment strategy to obtain new electrical parameter values ​​of each preset parameter type;

[0018] Replacing the electrical parameter values ​​of each preset parameter type with the new electrical parameter values ​​of each preset parameter type, and returning to execute the step of constructing an equivalent mathematical model of the co-directional parallel cables based on the phase electrical parameters to obtain a second current unbalance degree of the co-directional parallel cables;

[0019] Until the preset number of iterations is met, the second current imbalance corresponding to each electrical parameter value of each preset parameter type is obtained, and the second current imbalance corresponding to each electrical parameter value of each preset parameter type is respectively sorted and distributed to obtain the current imbalance distribution information corresponding to each preset parameter type;

[0020] Using the current imbalance distribution information corresponding to all preset parameter types as the cable current imbalance adjustment strategy of the co-directional parallel cables, and obtaining the proportional value of the target warning value;

[0021] Based on each of the second current-carrying imbalances, a warning value of the current-carrying imbalance of the parallel cables in the same direction is calculated by a ratio value of the target warning value.

[0022] Optionally, the identifying, based on the regulation strategy, a correlation between the electrical parameters of each phase of the co-directional parallel cables and the current imbalance degree includes:

[0023] Based on the current imbalance distribution information corresponding to each preset parameter type, identifying the change ratio value between the electrical parameter value of each preset parameter type and the current imbalance;

[0024] The change ratio values ​​corresponding to all preset parameter types are used as the correlation relationship between the electrical parameters of each phase of the same-direction parallel cable and the current imbalance degree.

[0025] Optionally, when the current imbalance corresponding to the current carrying data exceeds a warning value, adjusting the electrical parameters of each phase of the co-directional parallel cable based on the association relationship to obtain a target co-directional parallel cable includes:

[0026] Determining whether the first current imbalance is greater than the warning value, and when the first current imbalance is greater than the warning value, calculating a deviation between the first current imbalance and the warning value;

[0027] Based on the deviation value and the change ratio value corresponding to each of the preset parameter types, the target electrical parameter value of each of the preset parameter types is identified, and the target electrical parameter value of each of the preset parameter types is used to replace the electrical parameter value of each preset parameter type of the same-direction parallel cable to obtain the target same-direction parallel cable.

[0028] In a second aspect, the present application also provides a device for adjusting the imbalance of cable current carrying, comprising:

[0029] An acquisition module, used to acquire electrical parameters of each phase of the parallel cables in the same direction and current current carrying data of the parallel cables in the same direction, and to construct an equivalent mathematical model of the parallel cables in the same direction based on the electrical parameters of each phase;

[0030] An identification module, used for identifying an impedance matrix of the parallel cables in the same direction based on the equivalent mathematical model, and identifying an adjustment strategy for cable current unbalance of the parallel cables in the same direction and a warning value for the current unbalance of the parallel cables in the same direction based on the impedance matrix;

[0031] An adjustment module is used to identify the correlation between the electrical parameters of each phase of the co-directional parallel cable and the current imbalance based on the adjustment strategy, and when the current imbalance corresponding to the current carrying data exceeds the warning value, adjust the electrical parameters of each phase of the co-directional parallel cable based on the correlation to obtain the target co-directional parallel cable.

[0032] Optionally, the acquisition module is specifically used to:

[0033] For each phase, based on the electrical parameters of the phase, identifying the electrical parameter values ​​of each parameter type, and constructing a sub-equivalent mathematical model of the phase based on the electrical parameter values ​​of each parameter type;

[0034] The sub-equivalent mathematical models of all phases are used as the equivalent mathematical models of the same-direction parallel cables.

[0035] Optionally, the identification module is specifically used to:

[0036] Based on the sub-equivalent mathematical model of each phase, identifying each impedance influence data of each phase, and calculating the self-impedance information of each phase based on the each impedance influence data of each phase;

[0037] Identify the relative position information of the cables of each phase, and based on the relative position information of the cables of each phase, identify the mutual impedance information between the phases;

[0038] Based on the self-impedance information of each of the phases and the mutual impedance information between the phases, an impedance matrix of the parallel cables in the same direction is identified.

[0039] Optionally, the identification module is specifically used to:

[0040] Based on the impedance matrix, a first current unbalance degree of the co-directional parallel cables is calculated, and the electrical parameter values ​​of each preset parameter type are adjusted respectively through a preset adjustment strategy to obtain new electrical parameter values ​​of each preset parameter type;

[0041] Replacing the electrical parameter values ​​of each preset parameter type with the new electrical parameter values ​​of each preset parameter type, and returning to execute the step of constructing an equivalent mathematical model of the co-directional parallel cables based on the phase electrical parameters to obtain a second current unbalance degree of the co-directional parallel cables;

[0042] Until the preset number of iterations is met, the second current imbalance corresponding to each electrical parameter value of each preset parameter type is obtained, and the second current imbalance corresponding to each electrical parameter value of each preset parameter type is respectively sorted and distributed to obtain the current imbalance distribution information corresponding to each preset parameter type;

[0043] Using the current imbalance distribution information corresponding to all preset parameter types as the cable current imbalance adjustment strategy of the co-directional parallel cables, and obtaining the proportional value of the target warning value;

[0044] Based on each of the second current-carrying imbalances, a warning value of the current-carrying imbalance of the parallel cables in the same direction is calculated by a ratio value of the target warning value.

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

[0046] Based on the current imbalance distribution information corresponding to each preset parameter type, identifying the change ratio value between the electrical parameter value of each preset parameter type and the current imbalance;

[0047] The change ratio values ​​corresponding to all preset parameter types are used as the correlation relationship between the electrical parameters of each phase of the same-direction parallel cable and the current imbalance degree.

[0048] Optionally, the adjustment module is specifically used to:

[0049] Determining whether the first current imbalance is greater than the warning value, and when the first current imbalance is greater than the warning value, calculating a deviation between the first current imbalance and the warning value;

[0050] Based on the deviation value and the change ratio value corresponding to each of the preset parameter types, the target electrical parameter value of each of the preset parameter types is identified, and the target electrical parameter value of each of the preset parameter types is used to replace the electrical parameter value of each preset parameter type of the same-direction parallel cable to obtain the target same-direction parallel cable.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] The above-mentioned cable current imbalance adjustment method, device and computer equipment obtain the electrical parameters of each phase of the unidirectional parallel cables and the current current data of the unidirectional parallel cables, and construct an equivalent mathematical model of the unidirectional parallel cables based on the electrical parameters of each phase; based on the equivalent mathematical model, identify the impedance matrix of the unidirectional parallel cables, and based on the impedance matrix, identify the cable current imbalance adjustment strategy of the unidirectional parallel cables and the warning value of the current imbalance of the unidirectional parallel cables; based on the adjustment strategy, identify the correlation between the electrical parameters of each phase of the unidirectional parallel cables and the current imbalance, and when the current imbalance corresponding to the current data exceeds the warning value, adjust the electrical parameters of each phase of the unidirectional parallel cables based on the correlation to obtain the target unidirectional parallel cables. This solution identifies the electrical parameters of each phase of the unidirectional parallel cable, thereby constructing an equivalent mathematical model of the unidirectional parallel cable to analyze the correlation between the adjustment of the electrical parameters of each phase of the unidirectional parallel cable and the current imbalance, as well as the warning value of the current imbalance. Then, this solution monitors the change of the current imbalance of the unidirectional parallel cable in real time through the warning value of the current imbalance, and when it exceeds the warning value, directly adjusts the current imbalance of the unidirectional parallel cable quickly and reliably by adjusting the electrical parameters of each phase, thereby improving the current carrying capacity, stability and safety of the unidirectional parallel cable, and this method does not require complex algorithms and complex instrument calculation and processing processes, thereby comprehensively improving the efficiency of limiting the current imbalance of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] 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.

[0056] Figure 1 It is a schematic flow chart of a method for adjusting cable current imbalance in one embodiment;

[0057] Figure 2 A schematic diagram of a flow chart of an example of adjusting the cable current imbalance in one embodiment;

[0058] Figure 3 is a structural block diagram of a device for adjusting cable current imbalance in one embodiment;

[0059] Figure 4 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0060] 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.

[0061] The method for adjusting the cable current imbalance provided in the embodiment of the present application can be applied to the application environment of adjusting the current imbalance of the parallel cables in the same direction. The method can be applied to a terminal, a server, or a system including a terminal and a server, and is implemented through the interaction between the terminal and the server. The terminal can be, but is not limited to, various personal computers, laptops, etc. The terminal identifies the electrical parameters of each phase of the parallel cables in the same direction, thereby constructing an equivalent mathematical model of the parallel cables in the same direction, so as to analyze the correlation between the adjustment of the electrical parameters of each phase of the parallel cables in the same direction and the current imbalance, as well as the warning value of the current imbalance. Then, this solution monitors the changes in the current imbalance of the unidirectional parallel cables in real time through the warning value of the current imbalance, and when the warning value is exceeded, the current imbalance of the unidirectional parallel cables is quickly and reliably adjusted by directly adjusting the electrical parameters of each phase, thereby improving the current carrying capacity, stability and safety of the unidirectional parallel cables. In addition, this method does not require complex algorithms and complex instrument calculation and processing processes, thereby comprehensively improving the efficiency of limiting the current imbalance of the cables.

[0062] In an exemplary embodiment, Figure 1 As shown, a method for adjusting the cable current imbalance is provided, and the method is applied to a terminal as an example for explanation, including the following steps S101 to S103.

[0063] in:

[0064] Step S101, acquiring electrical parameters of each phase of the same-direction parallel cables and current current-carrying data of the same-direction parallel cables, and constructing an equivalent mathematical model of the same-direction parallel cables based on the electrical parameters of each phase.

[0065] In this embodiment, the terminal responds to the user's information upload operation to obtain the electrical parameters of each cable of each phase of the parallel cable in the same direction, and then the terminal collects the current carrying data of each cable of each phase of the parallel cable in the same direction by real-time detection of current data. Among them, the electrical parameters include electrical parameter values ​​of each parameter type, and the parameter types include but are not limited to cable structure, geometric dimensions, conductor materials, resistivity, capacitance and other parameter types. The current carrying data includes data such as current carrying capacity and current value. Then, the terminal constructs an equivalent mathematical model of the parallel cable in the same direction based on the electrical parameters of each phase. Among them, the equivalent mathematical model is an impedance equivalent model. Since the core reason for the current carrying imbalance is the electrical parameter imbalance, including the electrical parameter imbalance caused by the arrangement position, the electrical parameter imbalance caused by the mixing of new and old cables, and the electrical parameter imbalance caused by defects formed during long-term operation, the terminal can adjust the current carrying imbalance of the parallel cable in the same direction by adjusting the electrical parameters corresponding to the impedance. The specific construction process will be described in detail later.

[0066] Step S102, based on the equivalent mathematical model, identifying the impedance matrix of the parallel cables in the same direction, and based on the impedance matrix, identifying the adjustment strategy of the cable current unbalance of the parallel cables in the same direction and the warning value of the current unbalance of the parallel cables in the same direction.

[0067] In this embodiment, the terminal identifies the impedance matrix of the parallel cables in the same direction based on the equivalent mathematical model, and identifies the adjustment strategy of the cable current imbalance of the parallel cables in the same direction based on the impedance matrix, and the warning value of the current imbalance of the parallel cables in the same direction. Among them, the impedance matrix includes two parts: self-impedance and mutual impedance. The self-impedance is mainly determined by the parameter type such as cable structure, geometric size, conductor material, or resistivity, and the mutual impedance is determined by the relative position relationship between the cables. The specific identification process will be described in detail later. The mediation strategy includes the current imbalance distribution information corresponding to the preset parameter type. Among them, the preset parameter types are capacitance and resistivity. These two preset parameter types are the parameter types that have the greatest impact on the current imbalance. That is, by adjusting these two parameter types, the current imbalance of the parallel cables in the same direction can be adjusted efficiently and accurately. The warning value is the warning value calculated by the warning value ratio value preset by the staff in the terminal. The preset warning value ratio value can change with the adjustment of the staff. The warning value is used to control the start and stop of the adjustment of the electrical parameter values ​​of each preset parameter type of the same-direction parallel cables, that is, when the current imbalance is greater than the warning value, the terminal starts the adjustment task of the electrical parameter values ​​of each preset parameter type, and when the current imbalance is not greater than the warning value, the terminal turns off the adjustment task of the electrical parameter values ​​of each preset parameter type.

[0068] Step S103, based on the adjustment strategy, identify the correlation between the electrical parameters of each phase of the same-direction parallel cable and the current imbalance, and when the current imbalance corresponding to the current carrying data exceeds the warning value, adjust the electrical parameters of each phase of the same-direction parallel cable based on the correlation to obtain the target same-direction parallel cable.

[0069] In this embodiment, the terminal identifies the correlation between the electrical parameters of each phase of the parallel cables in the same direction and the current imbalance based on the adjustment strategy, and when the current imbalance corresponding to the current data exceeds the warning value, the terminal adjusts the electrical parameters of each phase of the parallel cables in the same direction based on the correlation to obtain the target parallel cables in the same direction. The correlation includes the electrical parameter value of each preset parameter type and the change ratio value between the current imbalance.

[0070] Based on the above scheme, by identifying the electrical parameters of each phase of the unidirectional parallel cable, an equivalent mathematical model of the unidirectional parallel cable is constructed to analyze the correlation between the adjustment of the electrical parameters of each phase of the unidirectional parallel cable and the current imbalance, as well as the warning value of the current imbalance. Then, this scheme monitors the change of the current imbalance of the unidirectional parallel cable in real time through the warning value of the current imbalance, and when it exceeds the warning value, directly adjusts the current imbalance of the unidirectional parallel cable quickly and reliably by adjusting the electrical parameters of each phase, thereby improving the current carrying capacity, stability and safety of the unidirectional parallel cable, and this method does not require complex algorithms and complex instrument calculation and processing processes, thereby comprehensively improving the efficiency of limiting the current imbalance of the cable.

[0071] Optionally, based on the electrical parameters of each phase, an equivalent mathematical model of the same-direction parallel cables is constructed, including: for each phase, based on the phase electrical parameters, identifying the electrical parameter values ​​of each parameter type, and based on the electrical parameter values ​​of each parameter type, constructing a sub-equivalent mathematical model of the phase; using the sub-equivalent mathematical models of all phases as the equivalent mathematical model of the same-direction parallel cables.

[0072] In this embodiment, the terminal identifies the electrical parameter values ​​of each parameter type for each phase based on the phase electrical parameters, and constructs the sub-equivalent mathematical model of the phase based on the electrical parameter values ​​of each parameter type. Then, the terminal uses the sub-equivalent mathematical models of all phases as the equivalent mathematical models of the parallel cables in the same direction. Among them, the way to construct the sub-equivalent mathematical models of each phase is to perform equivalent calculations on the electrical parameter values ​​of different parameter types of each cable of each phase through the construction method of the impedance mathematical model, and obtain the impedance values ​​corresponding to the electrical parameter values ​​of different parameter types of each cable of each phase. Then, the terminal constructs the sub-equivalent mathematical model of each phase based on each impedance value. Among them, the equivalent mathematical model of the parallel cables in the same direction is the equivalent mathematical model of the parallel cables in the same direction obtained by model splicing the sub-equivalent mathematical models of each phase through the relative position relationship between the cables of each phase.

[0073] Based on the above scheme, after constructing the sub-equivalent mathematical models of the single phases respectively, the equivalent mathematical model of the cables in parallel in the same direction is obtained by splicing them according to the relative position relationship of each cable, thereby improving the accuracy of the obtained equivalent mathematical model.

[0074] Optionally, based on an equivalent mathematical model, an impedance matrix of parallel cables in the same direction is identified, including: based on a sub-equivalent mathematical model of each phase, identifying each impedance influence data of each phase, and based on the each impedance influence data of each phase, calculating the self-impedance information of each phase; identifying the relative position information of the cable of each phase, and based on the relative position information of the cable of each phase, identifying the mutual impedance information between the phases; based on the self-impedance information of each phase and the mutual impedance information between the phases, identifying the impedance matrix of parallel cables in the same direction.

[0075] In this embodiment, the terminal identifies each impedance influence data of each phase based on the sub-equivalent mathematical model of each phase, and calculates the self-impedance information of each phase based on the impedance influence data of each phase. Among them, each impedance influence data is an impedance value corresponding to the electrical parameter value of the parameter type related to the self-impedance information in each parameter type. Then, the terminal calculates the self-impedance information of each phase based on the impedance value corresponding to the electrical parameter value of each parameter type according to the impedance matrix calculation strategy preset in the terminal by the staff.

[0076] Then, the terminal identifies the relative position information of the cables of each phase, and identifies the mutual impedance information between the phases based on the relative position information of the cables of each phase. The mutual impedance information includes the relative distance between the cables of each phase, and the number of cables contained between the cables of each phase. Finally, the terminal identifies the impedance matrix of the parallel cables in the same direction based on the self-impedance information of each phase and the mutual impedance information between the phases. The identification process is the impedance matrix construction process preset by the staff in the terminal, and this solution does not make redundant descriptions.

[0077] Based on the above scheme, the impedance matrix of the co-directional parallel cables is obtained by identifying the self-impedance information of each phase and the mutual impedance information between the phases, thereby improving the comprehensiveness and accuracy of the impedance matrix of the co-directional parallel cables.

[0078] Optionally, based on the impedance matrix, an adjustment strategy for the cable current imbalance of the same-direction parallel cables and a warning value for the current imbalance of the same-direction parallel cables are identified, including: based on the impedance matrix, calculating the first current imbalance of the same-direction parallel cables, and adjusting the electrical parameter values ​​of each preset parameter type respectively through a preset adjustment strategy to obtain new electrical parameter values ​​of each preset parameter type; replacing the electrical parameter values ​​of each preset parameter type with the new electrical parameter values ​​of each preset parameter type, and returning to execute the step of constructing an equivalent mathematical model of the same-direction parallel cables based on the electrical parameters of each phase to obtain the second current imbalance of the same-direction parallel cables. degree; until the preset number of iterations is met, the second current imbalance corresponding to each electrical parameter value of each preset parameter type is obtained, and the second current imbalance corresponding to each electrical parameter value of each preset parameter type is distributed and sorted respectively to obtain the current imbalance distribution information corresponding to each preset parameter type; the current imbalance distribution information corresponding to all preset parameter types is used as the adjustment strategy for the cable current imbalance of the same-direction parallel cables, and the proportional value of the target warning value is obtained; based on each second current imbalance, the warning value of the current imbalance of the same-direction parallel cables is calculated by the proportional value of the target warning value.

[0079] In this embodiment, the terminal calculates the first current unbalance of the co-directional parallel cable based on the impedance matrix, and adjusts the electrical parameter values ​​of each preset parameter type respectively through the preset adjustment strategy to obtain new electrical parameter values ​​of each preset parameter type. The preset adjustment strategy is a parameter value adjustment strategy for the electrical parameter value of each preset parameter type, and the parameter value adjustment strategy can be to adjust the unit parameter value respectively in each iteration process to obtain each new electrical parameter value. The unit parameter values ​​of different preset parameter types are different, and the unit parameter value can be preset in the terminal and change with the adjustment of the staff. The method of calculating the current unbalance based on the impedance matrix is ​​that the terminal verifies by means of the ATP-EMTP simulation system and experimental measurement, and adjusts the electrical parameter values ​​of each preset parameter type of the cable system by controlling the parameters of the parallel capacitor or resistor element, and then identifies the current unbalance in the cable system through the above-mentioned simulation system to obtain the first current unbalance. The cable system is a simulation model corresponding to the co-directional parallel cable.

[0080] Then, the terminal replaces the electrical parameter values ​​of each preset parameter type with the new electrical parameter values ​​of each preset parameter type, and returns to execute the equivalent mathematical model step of constructing the same-direction parallel cable based on the electrical parameters of each phase, and obtains the second current imbalance of the same-direction parallel cable. Then, the terminal obtains the second current imbalance corresponding to each electrical parameter value of each preset parameter type until the preset number of iterations is met, and distributes and sorts the second current imbalance corresponding to each electrical parameter value of each preset parameter type, respectively, to obtain the current imbalance distribution information corresponding to each preset parameter type. The preset number of iterations is the number of iterations preset by the staff in the terminal, and can change with the adjustment of the staff.

[0081] Then, the terminal uses the current imbalance distribution information corresponding to all preset parameter types as the adjustment strategy for the cable current imbalance of the parallel cables in the same direction, and obtains the proportional value of the target warning value. Finally, the terminal calculates the warning value of the current imbalance of the parallel cables in the same direction based on the proportional value of the target warning value of each second current imbalance. The proportional value can be 10% of the current current data.

[0082] Based on the above scheme, it is verified by means of ATP-EMTP simulation system and experimental measurement. By controlling the parameters of parallel capacitors or resistors, the impedance parameters of each phase of the cable system are adjusted. The difference in core resistivity will affect the current balance of the same-direction parallel cables, thereby improving the accuracy of the identification and adjustment strategy.

[0083] Optionally, based on the adjustment strategy, the correlation between the electrical parameters of each phase of the same-direction parallel cable and the current imbalance is identified, including: based on the current imbalance distribution information corresponding to each preset parameter type, identifying the change ratio value between the electrical parameter value of each preset parameter type and the current imbalance; using the change ratio values ​​corresponding to all preset parameter types as the correlation relationship between the electrical parameters of each phase of the same-direction parallel cable and the current imbalance.

[0084] In this embodiment, the terminal identifies the change ratio value between the electrical parameter value of each preset parameter type and the current imbalance based on the current imbalance distribution information corresponding to each preset parameter type, wherein the change ratio value is the ratio value between the electrical parameter adjustment value of the preset parameter type and the change value of the current imbalance.

[0085] The change ratio values ​​corresponding to all preset parameter types are used as the correlation relationship between the electrical parameters of each phase of the same-direction parallel cable and the current imbalance.

[0086] Based on the above scheme, the current imbalance distribution information corresponding to each preset parameter type is used to identify the change ratio between the electrical parameter value of each preset parameter type and the current imbalance, thereby identifying the correlation between the electrical parameters of each phase of the same-direction parallel cable and the current imbalance, thereby improving the accuracy and comprehensiveness of the identification of the correlation.

[0087] Optionally, when the current imbalance corresponding to the current current data exceeds the warning value, the electrical parameters of each phase of the same-direction parallel cable are adjusted based on the association relationship to obtain the target same-direction parallel cable, including: determining whether the first current imbalance is greater than the warning value, and when the first current imbalance is greater than the warning value, calculating the deviation value between the first current imbalance and the warning value; based on the deviation value and the change ratio value corresponding to each preset parameter type, identifying the target electrical parameter value of each preset parameter type, and replacing the electrical parameter value of each preset parameter type of the same-direction parallel cable with the target electrical parameter value of each preset parameter type to obtain the target same-direction parallel cable.

[0088] In this embodiment, the terminal determines whether the first current imbalance is greater than the warning value, and when the first current imbalance is greater than the warning value, calculates the deviation between the first current imbalance and the warning value. Then, the terminal calculates the target electrical parameter value of each preset parameter type based on the deviation value and the change ratio value corresponding to each preset parameter type, and replaces the electrical parameter value of each preset parameter type of the same-direction parallel cable with the target electrical parameter value of each preset parameter type to obtain the target same-direction parallel cable.

[0089] Based on the above scheme, the current imbalance of the cable system can be quickly and reliably adjusted by changing the equivalent resistivity of the wire core, and it has a dynamic adjustment function to improve the current carrying capacity, stability and safety of the same-direction parallel cables.

[0090] This application also provides an example of cable structure optimization design, such as Figure 2 As shown, the specific processing process includes the following steps:

[0091] Step S201, obtaining electrical parameters of each phase of the same-direction parallel cables and current current-carrying data of the same-direction parallel cables.

[0092] Step S202 : for each phase, based on the phase electrical parameters, identifying the electrical parameter values ​​of each parameter type, and constructing a sub-equivalent mathematical model of the phase based on the electrical parameter values ​​of each parameter type.

[0093] Step S203: taking the sub-equivalent mathematical models of all phases as the equivalent mathematical models of the parallel cables in the same direction.

[0094] Step S204: identifying each impedance influence data of each phase based on the sub-equivalent mathematical model of each phase, and calculating the self-impedance information of each phase based on the each impedance influence data of each phase.

[0095] Step S205, identifying the relative position information of the cables of each phase, and based on the relative position information of the cables of each phase, identifying the mutual impedance information between the phases.

[0096] Step S206, identifying the impedance matrix of the parallel cables in the same direction based on the self-impedance information of each phase and the mutual impedance information between the phases.

[0097] Step S207, based on the impedance matrix, calculate the first current unbalance of the cables connected in parallel in the same direction, and adjust the electrical parameter values ​​of each preset parameter type respectively through a preset adjustment strategy to obtain new electrical parameter values ​​of each preset parameter type.

[0098] Step S208, replacing the electrical parameter values ​​of each preset parameter type with the new electrical parameter values ​​of each preset parameter type, and returning to execute the step of constructing an equivalent mathematical model of the same-direction parallel cables based on the electrical parameters of each phase to obtain the second current-carrying imbalance of the same-direction parallel cables.

[0099] Step S209, until the preset number of iterations is met, the second current imbalance corresponding to each electrical parameter value of each preset parameter type is obtained, and the second current imbalance corresponding to each electrical parameter value of each preset parameter type is distributed and sorted to obtain the current imbalance distribution information corresponding to each preset parameter type.

[0100] Step S210: using the current imbalance distribution information corresponding to all preset parameter types as the adjustment strategy for the cable current imbalance of the same-direction parallel cables, and obtaining the ratio value of the target warning value.

[0101] Step S211, based on each second current imbalance, a warning value of the current imbalance of the parallel cables in the same direction is calculated by a ratio value of the target warning value.

[0102] Step S212: based on the current imbalance distribution information corresponding to each preset parameter type, identifying the change ratio value between the electrical parameter value of each preset parameter type and the current imbalance.

[0103] Step S213: taking the change ratio values ​​corresponding to all preset parameter types as the correlation relationship between the electrical parameters of each phase of the same-direction parallel cable and the current imbalance degree.

[0104] Step S214, determining whether the first current imbalance is greater than a warning value, and when the first current imbalance is greater than the warning value, calculating a deviation between the first current imbalance and the warning value.

[0105] Step S215, based on the deviation value and the change ratio value corresponding to each preset parameter type, identify the target electrical parameter value of each preset parameter type, and replace the electrical parameter value of each preset parameter type of the same-direction parallel cable with the target electrical parameter value of each preset parameter type to obtain the target same-direction parallel cable.

[0106] 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.

[0107] Based on the same inventive concept, the embodiment of the present application also provides a device for adjusting the cable current imbalance for implementing the method for adjusting the cable current imbalance involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the embodiments of one or more device for adjusting the cable current imbalance provided below can refer to the limitations of the method for adjusting the cable current imbalance above, and will not be repeated here.

[0108] In an exemplary embodiment, Figure 3 As shown, a device for adjusting the cable current imbalance is provided, comprising: an acquisition module 310, an identification module 320 and an adjustment module 330, wherein:

[0109] An acquisition module 310 is used to acquire electrical parameters of each phase of the parallel cables in the same direction and current current carrying data of the parallel cables in the same direction, and to construct an equivalent mathematical model of the parallel cables in the same direction based on the electrical parameters of each phase;

[0110] An identification module 320 is used to identify the impedance matrix of the parallel cables in the same direction based on the equivalent mathematical model, and to identify the adjustment strategy of the cable current unbalance of the parallel cables in the same direction and the warning value of the current unbalance of the parallel cables in the same direction based on the impedance matrix;

[0111] The adjustment module 330 is used to identify the correlation between the electrical parameters of each phase of the unidirectional parallel cable and the current imbalance based on the adjustment strategy, and when the current imbalance corresponding to the current carrying data exceeds the warning value, adjust the electrical parameters of each phase of the unidirectional parallel cable based on the correlation to obtain the target unidirectional parallel cable.

[0112] Optionally, the acquisition module 310 is specifically configured to:

[0113] For each phase, based on the electrical parameters of the phase, identifying the electrical parameter values ​​of each parameter type, and constructing a sub-equivalent mathematical model of the phase based on the electrical parameter values ​​of each parameter type;

[0114] The sub-equivalent mathematical models of all phases are used as the equivalent mathematical models of the same-direction parallel cables.

[0115] Optionally, the identification module 320 is specifically configured to:

[0116] Based on the sub-equivalent mathematical model of each phase, identifying each impedance influence data of each phase, and calculating the self-impedance information of each phase based on the each impedance influence data of each phase;

[0117] Identify the relative position information of the cables of each phase, and based on the relative position information of the cables of each phase, identify the mutual impedance information between the phases;

[0118] Based on the self-impedance information of each of the phases and the mutual impedance information between the phases, an impedance matrix of the parallel cables in the same direction is identified.

[0119] Optionally, the identification module 320 is specifically configured to:

[0120] Based on the impedance matrix, a first current unbalance degree of the co-directional parallel cables is calculated, and the electrical parameter values ​​of each preset parameter type are adjusted respectively through a preset adjustment strategy to obtain new electrical parameter values ​​of each preset parameter type;

[0121] Replacing the electrical parameter values ​​of each preset parameter type with the new electrical parameter values ​​of each preset parameter type, and returning to execute the step of constructing an equivalent mathematical model of the co-directional parallel cables based on the phase electrical parameters to obtain a second current unbalance degree of the co-directional parallel cables;

[0122] Until the preset number of iterations is met, the second current imbalance corresponding to each electrical parameter value of each preset parameter type is obtained, and the second current imbalance corresponding to each electrical parameter value of each preset parameter type is respectively sorted and distributed to obtain the current imbalance distribution information corresponding to each preset parameter type;

[0123] Using the current imbalance distribution information corresponding to all preset parameter types as the cable current imbalance adjustment strategy of the co-directional parallel cables, and obtaining the proportional value of the target warning value;

[0124] Based on each of the second current-carrying imbalances, a warning value of the current-carrying imbalance of the parallel cables in the same direction is calculated by a ratio value of the target warning value.

[0125] Optionally, the adjustment module 330 is specifically configured to:

[0126] Based on the current imbalance distribution information corresponding to each preset parameter type, identifying the change ratio value between the electrical parameter value of each preset parameter type and the current imbalance;

[0127] The change ratio values ​​corresponding to all preset parameter types are used as the correlation relationship between the electrical parameters of each phase of the same-direction parallel cable and the current imbalance degree.

[0128] Optionally, the adjustment module 330 is specifically configured to:

[0129] Determining whether the first current imbalance is greater than the warning value, and when the first current imbalance is greater than the warning value, calculating a deviation between the first current imbalance and the warning value;

[0130] Based on the deviation value and the change ratio value corresponding to each of the preset parameter types, the target electrical parameter value of each of the preset parameter types is identified, and the target electrical parameter value of each of the preset parameter types is used to replace the electrical parameter value of each preset parameter type of the same-direction parallel cable to obtain the target same-direction parallel cable.

[0131] Each module in the above-mentioned cable current imbalance adjustment device can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the corresponding operations of each of the above modules.

[0132] 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 4As 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 via a system bus, and the communication interface, the display unit and the input device are connected to the system bus via 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 adjusting the imbalance of cable current 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.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] 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 adjusting the unbalanced current of a cable, characterized in that: The method comprises: Acquire the electrical parameters of each phase of the parallel cables in the same direction and the current current carrying data of the parallel cables in the same direction, and construct an equivalent mathematical model of the parallel cables in the same direction based on the electrical parameters of each phase; Based on the equivalent mathematical model, an impedance matrix of the parallel cables in the same direction is identified, and based on the impedance matrix, a regulation strategy for the cable current unbalance of the parallel cables in the same direction and a warning value for the current unbalance of the parallel cables in the same direction are identified; Based on the adjustment strategy, the correlation between the electrical parameters of each phase of the same-direction parallel cable and the current imbalance is identified, and when the current imbalance corresponding to the current current data exceeds the warning value, the electrical parameters of each phase of the same-direction parallel cable are adjusted based on the correlation to obtain the target same-direction parallel cable.

2. The method according to claim 1, characterized in that: The equivalent mathematical model of the parallel cables in the same direction is constructed based on the electrical parameters of each phase, including: For each phase, based on the electrical parameters of the phase, identifying the electrical parameter values ​​of each parameter type, and constructing a sub-equivalent mathematical model of the phase based on the electrical parameter values ​​of each parameter type; The sub-equivalent mathematical models of all phases are used as the equivalent mathematical models of the same-direction parallel cables.

3. The method according to claim 2, characterized in that The step of identifying the impedance matrix of the co-directional parallel cables based on the equivalent mathematical model includes: Based on the sub-equivalent mathematical model of each phase, identifying each impedance influence data of each phase, and calculating the self-impedance information of each phase based on the each impedance influence data of each phase; Identify the relative position information of the cables of each phase, and based on the relative position information of the cables of each phase, identify the mutual impedance information between the phases; Based on the self-impedance information of each of the phases and the mutual impedance information between the phases, an impedance matrix of the parallel cables in the same direction is identified.

4. The method according to claim 3, characterized in that The method of identifying the adjustment strategy of the cable current unbalance of the parallel cables in the same direction and the warning value of the current unbalance of the parallel cables in the same direction based on the impedance matrix includes: Based on the impedance matrix, a first current unbalance degree of the co-directional parallel cables is calculated, and the electrical parameter values ​​of each preset parameter type are adjusted respectively through a preset adjustment strategy to obtain new electrical parameter values ​​of each preset parameter type; Replacing the electrical parameter values ​​of each preset parameter type with the new electrical parameter values ​​of each preset parameter type, and returning to execute the step of constructing an equivalent mathematical model of the co-directional parallel cables based on the phase electrical parameters to obtain a second current unbalance degree of the co-directional parallel cables; Until the preset number of iterations is met, the second current imbalance corresponding to each electrical parameter value of each preset parameter type is obtained, and the second current imbalance corresponding to each electrical parameter value of each preset parameter type is respectively sorted and distributed to obtain the current imbalance distribution information corresponding to each preset parameter type; Using the current imbalance distribution information corresponding to all preset parameter types as the cable current imbalance adjustment strategy of the co-directional parallel cables, and obtaining the proportional value of the target warning value; Based on each of the second current-carrying imbalances, a warning value of the current-carrying imbalance of the parallel cables in the same direction is calculated by a ratio value of the target warning value.

5. The method according to claim 4, characterized in that The identifying, based on the regulation strategy, the correlation between the electrical parameters of each phase of the co-directional parallel cables and the current imbalance degree comprises: Based on the current imbalance distribution information corresponding to each preset parameter type, identifying the change ratio value between the electrical parameter value of each preset parameter type and the current imbalance; The change ratio values ​​corresponding to all preset parameter types are used as the correlation relationship between the electrical parameters of each phase of the same-direction parallel cable and the current imbalance degree.

6. The method according to claim 5, characterized in that When the current imbalance corresponding to the current carrying data exceeds the warning value, adjusting the electrical parameters of each phase of the co-directional parallel cable based on the association relationship to obtain the target co-directional parallel cable includes: Determining whether the first current imbalance is greater than the warning value, and when the first current imbalance is greater than the warning value, calculating a deviation between the first current imbalance and the warning value; Based on the deviation value and the change ratio value corresponding to each of the preset parameter types, the target electrical parameter value of each of the preset parameter types is identified, and the target electrical parameter value of each of the preset parameter types is used to replace the electrical parameter value of each preset parameter type of the same-direction parallel cable to obtain the target same-direction parallel cable.

7. A device for adjusting the unbalanced current of a cable, characterized in that: The device comprises: An acquisition module, used to acquire electrical parameters of each phase of the parallel cables in the same direction and current current carrying data of the parallel cables in the same direction, and to construct an equivalent mathematical model of the parallel cables in the same direction based on the electrical parameters of each phase; An identification module, used for identifying an impedance matrix of the parallel cables in the same direction based on the equivalent mathematical model, and identifying an adjustment strategy for cable current unbalance of the parallel cables in the same direction and a warning value for the current unbalance of the parallel cables in the same direction based on the impedance matrix; An adjustment module is used to identify the correlation between the electrical parameters of each phase of the co-directional parallel cable and the current imbalance based on the adjustment strategy, and when the current imbalance corresponding to the current carrying data exceeds the warning value, adjust the electrical parameters of each phase of the co-directional parallel cable based on the correlation to obtain the target co-directional parallel cable.

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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