Cable ampacity correction method and device based on dynamic thermal carrying capacity modulation, equipment and storage medium

Abstract

The application discloses a cable current-carrying capacity correction method and device based on dynamic thermal carrying capacity modulation, equipment and storage medium, relates to the power cable operation monitoring and current-carrying capacity evaluation technical field, and includes: obtaining voltage data, current data and conductor temperature data when the cable is running;Based on the operating power of the voltage data and the current data, the disturbance characteristic parameters are processed, and the disturbance characteristic parameter information is determined;Based on the power deviation, the power change rate and the power fluctuation standard deviation in the disturbance characteristic parameter information, the thermal carrying capacity coefficient information is determined;Based on the thermal carrying capacity coefficient and the conductor temperature data, the reference cable current-carrying capacity under the preset constraint condition is corrected, and the cable current-carrying capacity correction result is obtained.The application processes the disturbance characteristic parameters to solve the thermal carrying capacity coefficient, so that the current-carrying capacity can be dynamically corrected, and the adaptive adjustment of high disturbance derating and smooth recovery is realized.

Description

Technical Field

[0001] This application relates to the field of power cable operation monitoring and current-carrying capacity assessment technology, and in particular to a cable current-carrying capacity correction method, device, equipment and storage medium based on dynamic thermal load capacity modulation. Background Technology

[0002] In actual operation, the load on power cables can exhibit fluctuations, sudden changes, and periodicity. Therefore, in order to ensure the safe operation of cables and improve line utilization, it is necessary to be able to sense the operating disturbance status in real time and dynamically adjust the maximum allowable current carrying capacity.

[0003] Currently, most existing methods use steady-state thermal balance models to calculate cable current carrying capacity. This involves calculating the maximum allowable current based on the upper limit of cable conductor temperature, ambient temperature, and heat dissipation conditions using thermal balance equations. While this method is applicable to stable operating conditions, it fails to reflect the impact of dynamic processes such as power fluctuations and sudden load changes on heat accumulation capacity. Furthermore, under disturbed operating conditions, it can easily lead to overestimation of current carrying capacity or delayed response, increasing thermal risks. Therefore, how to accurately correct cable current carrying capacity under disturbed operating conditions has become an urgent problem to be solved. Summary of the Invention

[0004] The main objective of this application is to provide a cable current carrying capacity correction method, device, equipment, and storage medium based on dynamic thermal load capacity modulation, aiming to solve the technical problem of how to accurately correct the cable current carrying capacity under disturbed operating conditions.

[0005] To achieve the above objectives, this application proposes a cable current-carrying capacity correction method based on dynamic thermal carrying capacity modulation, the method comprising: Acquire voltage, current, and conductor temperature data during cable operation; Based on the operating power of the voltage and current data, the disturbance characteristic parameters are processed to determine the disturbance characteristic parameter information; The thermal load capacity coefficient information is determined based on the power deviation, power change rate and power fluctuation standard deviation in the disturbance characteristic parameter information. Based on the thermal carrying capacity coefficient and the conductor temperature data, the current carrying capacity of the reference cable under preset constraints is corrected to obtain the cable current carrying capacity correction result.

[0006] In one embodiment, the step of processing the disturbance characteristic parameters based on the operating power of the voltage data and the current data to determine the disturbance characteristic parameter information includes: Obtain runtime information; The operating power is obtained by multiplying the voltage data and the current data based on the operating time information. The disturbance characteristic parameters are processed based on the running time information and the running power to determine the disturbance characteristic parameter information.

[0007] In one embodiment, the step of processing the disturbance characteristic parameters based on the running time information and the running power to determine the disturbance characteristic parameter information includes: The average allowable power is determined based on the running time information and the running power. The power deviation is determined by calculating the difference between the operating power and the average allowable power based on the operating time information. The rate of change of power is determined by solving the derivative of the operating power with respect to the operating time information. The standard deviation of the operating power is calculated based on the operating time information to determine the standard deviation of power fluctuation; The disturbance characteristic parameter information is obtained based on the power deviation, the power change rate, and the power fluctuation standard deviation.

[0008] In one embodiment, the step of determining the thermal carrying capacity coefficient information based on the power deviation, power change rate, and power fluctuation standard deviation in the disturbance characteristic parameter information includes: The comprehensive disturbance intensity value is obtained by weighting and summing the power deviation, power change rate, and power fluctuation standard deviation in the disturbance characteristic parameter information with preset weighting coefficients. Based on the comprehensive disturbance intensity value, the thermal bearing capacity coefficient within the preset range is calculated to obtain the thermal bearing capacity coefficient information.

[0009] In one embodiment, the step of correcting the current-carrying capacity of a reference cable under preset constraints based on the thermal carrying capacity coefficient and the conductor temperature data to obtain the corrected current-carrying capacity result includes: Based on the preset constraint conditions, the corresponding constraint parameter information is configured. The constraint parameter information includes equivalent heat capacity, equivalent resistance, comprehensive heat dissipation coefficient, ambient temperature, allowable temperature of cable conductor, and thermal inertia time constant. The current carrying capacity of the reference cable is calculated based on the conductor temperature data and the constraint parameter information to determine the current carrying capacity information of the reference cable; The current carrying capacity information of the reference cable is corrected based on the thermal load capacity coefficient to obtain the cable current carrying capacity correction result.

[0010] In one embodiment, the step of calculating the current-carrying capacity of the reference cable based on the conductor temperature data and the constraint parameter information to determine the current-carrying capacity information of the reference cable includes: The first temperature difference is determined based on the ambient temperature and the allowable temperature of the cable conductor in the constraint parameter information. The second temperature difference is determined based on the cable conductor's allowable temperature and the conductor temperature data in the constraint parameter information. The current carrying capacity of the reference cable is calculated based on the first temperature difference, the second temperature difference, and the equivalent heat capacity, equivalent resistance, comprehensive heat dissipation coefficient, and thermal inertia time constant in the constraint parameter information to obtain the current carrying capacity information of the reference cable.

[0011] In one embodiment, the step of correcting the current-carrying capacity information of the reference cable based on the thermal carrying capacity coefficient to obtain the cable current-carrying capacity correction result includes: The numerator in the current carrying capacity information of the reference cable is adjusted based on the modulation factor corresponding to the thermal carrying capacity coefficient to obtain the correction numerator. The current carrying capacity information of the reference cable is corrected based on the correction numerator to obtain the cable current carrying capacity correction result.

[0012] Furthermore, to achieve the above objectives, this application also proposes a cable current-carrying capacity correction device based on dynamic thermal carrying capacity modulation, the cable current-carrying capacity correction device based on dynamic thermal carrying capacity modulation comprising: The data acquisition module is used to acquire voltage data, current data, and conductor temperature data during cable operation. The processing module is used to process the disturbance characteristic parameters based on the operating power of the voltage data and the current data, and determine the disturbance characteristic parameter information; The processing module is also used to determine the thermal load capacity coefficient information based on the power deviation, power change rate and power fluctuation standard deviation in the disturbance characteristic parameter information; The execution module is used to correct the current carrying capacity of the reference cable under preset constraints based on the thermal carrying capacity coefficient and the conductor temperature data, and obtain the cable current carrying capacity correction result.

[0013] Furthermore, to achieve the above objectives, this application also proposes a cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation. The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. The computer program is configured to implement the steps of the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation as described above.

[0014] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation as described above.

[0015] One or more technical solutions proposed in this application have at least the following technical effects: This embodiment proposes a cable current-carrying capacity correction method based on dynamic thermal carrying capacity modulation. The method acquires voltage, current, and conductor temperature data during cable operation. Based on the operating power of the voltage and current data, disturbance characteristic parameters are processed to determine disturbance characteristic parameter information. Thermal carrying capacity coefficient information is determined based on the power deviation, power change rate, and power fluctuation standard deviation in the disturbance characteristic parameter information. The current-carrying capacity of a reference cable under preset constraints is corrected based on the thermal carrying capacity coefficient and the conductor temperature data to obtain the cable current-carrying capacity correction result. This application acquires voltage, current, and conductor temperature data during cable operation, thereby accurately capturing the actual impact of load fluctuations on the thermal process and calculating operating power to process disturbance characteristic parameters. It can quantify the instability of system operation in multiple dimensions, enabling the quantification of disturbance intensity. Based on this, the thermal carrying capacity coefficient can be calculated, which monotonically decreases as the disturbance increases and recovers and increases as the disturbance decreases. This allows for a reasonable deduction of the cable's ability to withstand additional heat loads under current operating conditions. By combining the thermal carrying capacity coefficient with conductor temperature data, the reference cable current carrying capacity under preset constraints can be corrected. This allows for the proactive reduction of allowable current carrying capacity to suppress thermal shock under high disturbance conditions and the restoration of current carrying capacity to improve line utilization under stable conditions, achieving continuous and adaptive dynamic adjustment of cable current carrying capacity according to operating status. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a flowchart illustrating an embodiment of the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation in this application. Figure 2 This is a comparison diagram of the current carrying capacity correction method for cables based on dynamic thermal carrying capacity modulation in this application. Figure 3 This is the temperature response diagram of the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation in this application; Figure 4 This is a graph showing the variation of the thermal carrying capacity coefficient in the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation of this application; Figure 5This is a comparison chart of the maximum allowable current carrying capacity of the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation in this application; Figure 6 This is a flowchart illustrating Embodiment 2 of the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation of this application; Figure 7 A simplified flowchart illustrating the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation provided in this application embodiment; Figure 8 This is a schematic diagram of the module structure of the cable current carrying capacity correction device based on dynamic thermal load capacity modulation according to an embodiment of this application; Figure 9 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation in the embodiments of this application.

[0019] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0021] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0022] The main solution of this application embodiment is as follows: acquiring voltage data, current data, and conductor temperature data of the cable during operation; processing disturbance characteristic parameters based on the operating power of the voltage data and the current data to determine disturbance characteristic parameter information; determining thermal carrying capacity coefficient information based on the power deviation, power change rate, and power fluctuation standard deviation in the disturbance characteristic parameter information; and correcting the reference cable current carrying capacity under preset constraint conditions based on the thermal carrying capacity coefficient and the conductor temperature data to obtain the cable current carrying capacity correction result.

[0023] In this embodiment, for ease of description, the following description will focus on identifying a cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation.

[0024] Because existing technologies cannot reflect the impact of dynamic processes such as power fluctuations and sudden load changes on heat accumulation capacity, and under disturbed operating conditions, they are prone to overestimating current carrying capacity or delaying response, thus increasing thermal risks.

[0025] This application provides a solution that, by acquiring voltage, current, and conductor temperature data during cable operation, can accurately capture the actual impact of load fluctuations on the thermal process and calculate operating power to process disturbance characteristic parameters. This allows for multi-dimensional quantification of system instability, enabling the quantification of disturbance intensity. Based on this, the thermal carrying capacity coefficient can be calculated, which monotonically decreases with increasing disturbance and recovers and increases with decreasing disturbance. This allows for a reasonable deduction of the cable's ability to withstand additional heat loads under current operating conditions. By combining the thermal carrying capacity coefficient with conductor temperature data, the baseline cable current carrying capacity under preset constraints can be corrected. This proactively reduces the allowable current carrying capacity to suppress thermal shock under high disturbance conditions and restores the current carrying capacity to improve line utilization under stable conditions, achieving continuous and adaptive dynamic adjustment of the cable's current carrying capacity according to operating status.

[0026] Based on this, embodiments of this application provide a cable current-carrying capacity correction method based on dynamic thermal carrying capacity modulation, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation of this application.

[0027] In this embodiment, the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation includes steps S10~S40: Step S10: Obtain voltage data, current data, and conductor temperature data during cable operation; It should be noted that the voltage data is the instantaneous value of the potential difference between the two ends of the cable conductor, in volts (V); the current data is the instantaneous value of the charge flow through the cable conductor, in amperes (A); and the conductor temperature data is the real-time temperature value of the conductor inside the cable, in degrees Celsius (°C).

[0028] In a specific embodiment, the voltage data, the current data, and the conductor temperature data are the basic physical quantities in cable operation status monitoring, used to characterize the electrical load level and heat accumulation degree of the cable. They can be directly obtained through online monitoring devices, protection and control terminals, or power distribution automation systems deployed on the cable line, without the need for additional complex sensors or high-cost testing equipment.

[0029] Step S20: Based on the operating power of the voltage data and the current data, process the disturbance characteristic parameters to determine the disturbance characteristic parameter information; It should be noted that the disturbance characteristic parameter information is a multi-dimensional feature set that can quantify the degree of instability of the cable's operating state, thereby effectively distinguishing different operating conditions such as stable load, slowly changing load, periodic fluctuation and sudden impact.

[0030] In a specific embodiment, the runtime information is obtained by recording the time corresponding to each voltage and current data point through the system clock or sampling counter. This establishes a unified time reference, ensuring that the calculation of all disturbance characteristics has a clear time scale, which facilitates synchronization and comparison.

[0031] The operating power is obtained by multiplying the voltage data and the current data based on the operating time information. Specifically, the operating power is obtained by multiplying the real-time collected voltage data and current data point by point based on the operating time information, expressed as:

[0032] in, For a moment Operating voltage, For a moment Operating power.

[0033] This converts electrical quantities into power signals that directly reflect the intensity of heat generation, enabling real-time capture of the impact of load changes on the heat source.

[0034] The average allowable power is determined based on the running time information and the running power. That is, the average allowable power can be calculated by the power value within the sliding window. The length of the sliding window can be dynamically adjusted according to the cable thermal inertia time constant, which can eliminate instantaneous noise interference and provide a stable benchmark for measuring power deviation.

[0035] Based on the running time information, the difference between the running power and the average allowable power is calculated to determine the power deviation, i.e., the difference between the instantaneous power and the average power is calculated to obtain the power deviation, expressed as:

[0036] in, The average power within the sliding time window can quantify the degree of deviation of the current operating point from the normal state, and promptly identify sudden increases or decreases in load.

[0037] The power change rate is determined by calculating the derivative of the operating power with respect to the operating time information, which is expressed as follows:

[0038] in, This represents the average power within the sliding time window.

[0039] at this time, It can characterize the rate and trend of power changes and can detect the speed of sudden load changes in advance.

[0040] Based on the runtime information, the standard deviation of the operating power is calculated to determine the power fluctuation standard deviation. Specifically, the standard deviation of the operating power within the sliding window is calculated based on the runtime information to obtain the power fluctuation standard deviation, which is expressed as follows:

[0041] in, The sampling window length, For the first in the window Power values ​​at each sampling point. The standard deviation of power fluctuations can characterize the degree of dispersion of power fluctuations over a period of time, and quantify the overall instability of the system.

[0042] Based on the power deviation, the power change rate, and the power fluctuation standard deviation, disturbance characteristic parameter information is obtained, which can characterize the system disturbance state from three dimensions: offset, change rate, and fluctuation amplitude, thereby improving the accuracy of the thermal load capacity coefficient in representing real operating conditions.

[0043] In one feasible implementation, step S20 may include steps A11 to A13: Step A11: Obtain runtime information; It should be noted that the running time information is a time marker corresponding to each set of voltage and current data, in seconds or milliseconds, used to determine the order and time interval of data sampling.

[0044] It is understandable that obtaining accurate runtime information can provide a unified time reference, thereby ensuring that the calculation of disturbance characteristic parameters has the correct temporal relationship and physical meaning, and avoiding feature distortion caused by time misalignment.

[0045] Step A12: Multiply the voltage data and the current data based on the running time information to obtain the running power; It should be noted that the operating power is the instantaneous electrical power of the cable in its current operating state, used to quantify the amount of electrical energy transmitted by the cable and the intensity of the heat source. It can be calculated by multiplying the instantaneous voltage value and the instantaneous current value.

[0046] Step A13: Process the disturbance characteristic parameters based on the running time information and the running power to determine the disturbance characteristic parameter information.

[0047] It is understandable that by combining the running time information and the running power to process the disturbance characteristic parameters, the system disturbance intensity can be comprehensively characterized from three dimensions: offset, rate of change, and fluctuation amplitude, thereby improving the ability to perceive dynamic operating conditions.

[0048] In one feasible implementation, step A13 may include steps B11 to B15: Step B11: Determine the average allowable power based on the running time information and the running power; It should be noted that the average allowable power is the value obtained by averaging the operating power sequence within a preset sliding time window.

[0049] It is understandable that the average allowable power can effectively filter out instantaneous random noise and short-term glitches, making the judgment of the degree of power deviation more reliable and avoiding misjudgment caused by instantaneous fluctuations.

[0050] Step B12: Based on the running time information, calculate the difference between the running power and the average allowable power to determine the power deviation; It should be noted that the power deviation is the difference between the current operating power and the average allowable power at the same time, that is, the instantaneous power minus the window average power. Its value can be positive or negative and is used to characterize the direction and magnitude of the deviation of the current power from the recent average level.

[0051] It is understandable that the power deviation can promptly capture sudden increases or decreases in load. For example, when the absolute value of the deviation is large, it means that the system has experienced a significant power step, requiring enhanced response to load shocks.

[0052] Step B13: Calculate the power change rate based on the derivative of the operating power with respect to the operating time information; It should be noted that the power change rate is the derivative of operating power with respect to time, that is, the amount of power change per unit time. It is used to describe the speed and trend of power change over time. A positive value indicates that the power is increasing, and a negative value indicates that the power is decreasing.

[0053] It is understandable that the power change rate can detect the speed of load change in advance. Even if the current power has not deviated significantly from the average value, a large change rate indicates an upcoming thermal disturbance, thereby enabling the thermal load capacity coefficient to have predictive adjustment capabilities and effectively suppress the risk of overheating caused by rapid load increase.

[0054] Step B14: Calculate the standard deviation of the operating power based on the running time information to determine the standard deviation of power fluctuation; It should be noted that the power fluctuation standard deviation is the square root of the mean of the squares of the deviations of the operating power of each sampling point from the average power within the sliding time window, i.e., the sample standard deviation of the power sequence, which is used to quantify the dispersion or magnitude of power fluctuations over a period of time.

[0055] It is understood that the power fluctuation standard deviation describes the overall instability of the system from a statistical perspective. Even if the instantaneous power deviation and rate of change are not large, continuous high-frequency fluctuations will accumulate thermal effects. By introducing this feature, the long-term impact of fluctuations on thermal load capacity can be comprehensively evaluated, making the disturbance intensity function more comprehensive and robust.

[0056] Step B15: Obtain disturbance characteristic parameter information based on the power deviation, the power change rate, and the power fluctuation standard deviation.

[0057] It is understandable that the power deviation, the power change rate, and the power fluctuation standard deviation can accurately distinguish different types and intensities of disturbance scenarios, thereby improving the accuracy and adaptability of cable current carrying capacity correction.

[0058] Step S30: Determine the thermal load capacity coefficient information based on the power deviation, power change rate, and power fluctuation standard deviation in the disturbance characteristic parameter information; It should be noted that the heat load capacity coefficient is a dimensionless coefficient with a value range of (0,1). It is used to characterize the cable's ability to withstand additional heat load under the current operating disturbance state. The larger the heat load capacity coefficient, the greater the additional heat power that the cable can safely withstand under the current conditions, i.e., the higher the available current carrying capacity. Conversely, the smaller the heat load capacity coefficient, the more severe the system disturbance, the lower the cable's thermal stability, and the more the additional heat load should be reduced to avoid the risk of overheating.

[0059] In a specific embodiment, the power deviation, power change rate, and power fluctuation standard deviation in the disturbance characteristic parameter information are weighted and summed with preset weighting coefficients to obtain the comprehensive disturbance intensity value, that is, the weighting coefficients can be pre-calibrated. The influence of power deviation, power change rate, and power fluctuation standard deviation is calculated by assigning the absolute value of power deviation |ΔP| and the absolute value of power change rate |ΔP| to the power deviation standard deviation. | and power fluctuation standard deviation Multiply each product by its corresponding weight coefficient, and then add the three products together. This can be expressed as:

[0060] in, This represents the weighting coefficient corresponding to each disturbance characteristic, used to reflect the degree of influence of different factors on thermal load-bearing capacity. This allows us to obtain the comprehensive disturbance intensity value. , The larger the value, the more drastic the current operating state, the more frequent the load changes, and the higher the dynamic thermal pressure faced by the system.

[0061] Based on the comprehensive disturbance intensity value, the thermal carrying capacity coefficient within the preset range is calculated to obtain the thermal carrying capacity coefficient information. This means that considering the decrease in the cable's heat load capacity under high disturbance conditions, the thermal carrying capacity coefficient can be... The solution is performed, and it is expressed as follows:

[0062] Its range of values ​​satisfies:

[0063] Among these methods, a reciprocal mapping relationship can be used to ensure that the thermal load-bearing capacity decreases monotonically when the disturbance intensifies, while guaranteeing that the coefficient remains within the (0,1] interval, facilitating engineering constraint calculations. When the system operates smoothly and the disturbance is small, Approaching zero, therefore Approaching 1; When system power fluctuations increase and sudden changes become more frequent, Increase, therefore Decrease. Power fluctuations increase thermal input instability. The use of operational disturbance intensity to characterize the instantaneous thermal carrying capacity of a cable has a clear physical correlation; therefore, the aforementioned thermal carrying capacity coefficient... It can be used to characterize the cable's ability to withstand additional heat loads under current operating conditions.

[0064] In one feasible implementation, step S30 may include steps C11-C12: Step C11: Based on the power deviation, power change rate, and power fluctuation standard deviation in the disturbance characteristic parameter information, a weighted sum is performed with a preset weighting coefficient to obtain the comprehensive disturbance intensity value; It should be noted that the comprehensive disturbance intensity value is a non-negative scalar value used to uniformly quantify the comprehensive dynamic pressure that the cable is subjected to under the current operating conditions. The larger the value, the more severe the disturbance.

[0065] Understandably, the preset weighting coefficients are constants pre-calibrated based on the cable type, laying method, and operating scenario, respectively characterizing the influence of power deviation, power change rate, and power fluctuation standard deviation on thermal load capacity. The weighted summation multiplies each disturbance characteristic by its corresponding weighting coefficient and then adds them together, thereby achieving a differentiated combination of the contributions of disturbances in different dimensions, making the comprehensive disturbance intensity value adjustable.

[0066] Step C12: Based on the comprehensive disturbance intensity value, calculate the thermal load capacity coefficient within the preset range to obtain the thermal load capacity coefficient information.

[0067] It is understandable that the preset range is the range of values ​​for the thermal carrying capacity coefficient, i.e. (0,1]. The lower limit is greater than 0 to ensure the boundedness of the modulation factor, and the upper limit is 1 to ensure that no additional conservative derating is performed under stable operating conditions. This ensures that the coefficient is always within a reasonable physical range, which can effectively reduce the allowable current carrying capacity to suppress thermal risks under high disturbances, and restore full capacity operation under no disturbances, thus achieving a balance between safety and utilization.

[0068] Step S40: Based on the thermal carrying capacity coefficient and the conductor temperature data, the current carrying capacity of the reference cable under preset constraints is corrected to obtain the cable current carrying capacity correction result.

[0069] Understandably, the reference cable current carrying capacity under preset constraints is the maximum allowable current carrying capacity calculated solely based on the current conductor temperature, given fixed constraint parameters such as the maximum allowable temperature of the cable conductor, ambient temperature, equivalent heat capacity, equivalent resistance, comprehensive heat dissipation coefficient, and thermal inertia time constant. Since the impact of operational disturbances is not considered, it is necessary to introduce a thermal carrying capacity coefficient for dynamic correction. This allows the corrected cable current carrying capacity to automatically decrease during periods of high disturbance and recover and increase during periods of stability, thus achieving a balance between safety and utilization while meeting the upper limit of temperature constraints.

[0070] In a specific embodiment, corresponding constraint parameter information is configured based on the preset constraint conditions. This constraint parameter information includes equivalent heat capacity, equivalent resistance, comprehensive heat dissipation coefficient, ambient temperature, allowable temperature of the cable conductor, and thermal inertia time constant. That is, during cable operation, Joule heat is generated by current flowing through the conductor, and heat is simultaneously dissipated to the outside through the insulation layer, sheath, and surrounding medium. Its temperature change is determined by both heat generation and heat dissipation. Therefore, based on the actual conditions such as cable type and specifications (e.g., cross-section, insulation material), laying method (e.g., direct burial, duct laying, air laying), and operating environment (e.g., soil thermal resistance, ambient temperature), the equivalent heat capacity C, equivalent resistance R, comprehensive heat dissipation coefficient h, and ambient temperature can be pre-configured by consulting standard parameter tables, experimental measurements, or thermal circuit model calculations. Maximum allowable temperature of cable conductor and thermal inertia time constant Constraint parameters are obtained, and this constraint parameter information is embedded in the basic thermal process model to describe the dynamic evolution of cable temperature. At this point, the model structure does not need to be modified to ensure that the thermal analysis process has clear physical meaning and engineering interpretability. The basic thermal process model is represented as follows:

[0071] in, This is the equivalent heat capacity of the cable, used to characterize the inertial characteristics of temperature change after the cable absorbs heat. For a moment Operating current, The equivalent resistance of the conductor. The comprehensive heat dissipation coefficient is used to characterize the cable's ability to dissipate heat to the environment. For the temperature of the cable conductor, The ambient temperature.

[0072] The current carrying capacity of the reference cable is calculated based on the conductor temperature data and the constraint parameter information to determine the current carrying capacity information of the reference cable. That is, the conductor temperature data T(t) is used, and the ambient temperature is extracted from the constraint parameter information. Maximum permissible temperature The equivalent heat capacity C, equivalent resistance R, comprehensive heat dissipation coefficient h, and thermal inertia time constant τ are used to calculate the current carrying capacity of the reference cable. This is done at a given maximum allowable operating temperature of the cable. Under the given conditions, the maximum allowable current carrying capacity can be calculated, which is the maximum current value allowed to pass through the reference cable while still meeting the temperature constraint during subsequent operating cycles. This is expressed as:

[0073] in, The maximum allowable temperature for the cable conductor. is the thermal inertia time constant, used to describe the response time scale of a system to temperature changes. It should be understood that the reference cable current carrying capacity can characterize the allowable current carrying capacity under the current thermal state. However, at this time, the system operating conditions are assumed to be relatively stable, and dynamic disturbance factors such as load fluctuations and power changes are not considered. Therefore, it is necessary to correct the reference cable current carrying capacity information.

[0074] Based on the thermal carrying capacity coefficient, the current carrying capacity information of the reference cable is corrected to obtain the cable current carrying capacity correction result, which can be used to obtain the dynamic thermal carrying capacity coefficient. The modulation factor is used to correct the numerator of the reference current carrying capacity, expressed as:

[0075] in, This is the maximum allowable current carrying capacity after dynamic correction, which yields the cable current carrying capacity correction result. At this point, when the system is running stably, When the value is close to 1, the cable current carrying capacity correction result approaches the traditional current carrying capacity value, allowing the system to fully utilize its available capacity. This is especially beneficial when the system is under high fluctuation or sudden change conditions. This reduces the maximum allowable current carrying capacity, thereby decreasing the risk of thermal shock as the disturbance weakens. It can be gradually restored, allowing the current-carrying capacity to recover synchronously, thereby enabling continuous adaptive adjustment of the cable's current-carrying capacity according to changes in operating conditions.

[0076] This embodiment proposes a cable current-carrying capacity correction method based on dynamic thermal carrying capacity modulation. The method acquires voltage, current, and conductor temperature data during cable operation. Based on the operating power of the voltage and current data, disturbance characteristic parameters are processed to determine disturbance characteristic parameter information. Thermal carrying capacity coefficient information is determined based on the power deviation, power change rate, and power fluctuation standard deviation in the disturbance characteristic parameter information. The current-carrying capacity of a reference cable under preset constraints is corrected based on the thermal carrying capacity coefficient and the conductor temperature data to obtain the cable current-carrying capacity correction result. This invention solves the technical problem of accurately correcting the current-carrying capacity of cables under disturbance conditions. Compared with existing technologies, this application obtains voltage, current, and conductor temperature data during cable operation, thereby accurately capturing the actual impact of load fluctuations on the thermal process and calculating the operating power to process disturbance characteristic parameters. This allows for multi-dimensional quantification of system instability and quantification of disturbance intensity. Based on this, the thermal carrying capacity coefficient can be calculated, which monotonically decreases as the disturbance increases and recovers and increases as the disturbance decreases. This allows for a reasonable deduction of the cable's ability to withstand additional heat loads under current operating conditions. By combining the thermal carrying capacity coefficient with conductor temperature data, the reference cable current-carrying capacity under preset constraints can be corrected. This enables the cable to proactively reduce the allowable current-carrying capacity to suppress thermal shock under high disturbance conditions and restore the current-carrying capacity to improve line utilization under stable conditions, achieving continuous and adaptive dynamic adjustment of the cable's current-carrying capacity according to the operating state.

[0077] It should be understood that, to verify the effectiveness of this application under high load and disturbance conditions, the simulation uses a constrained activation scenario. The total simulation duration is set to 30 seconds, the time step is 0.01 seconds, the equivalent resistance of the cable conductor is set to 0.01 ohms, the equivalent heat capacity is set to 500, and the comprehensive heat dissipation coefficient is set to 2. The ambient temperature is set to 45 degrees Celsius, and the maximum allowable temperature of the cable is set to 60 degrees Celsius as an example temperature constraint value. In actual applications, n can be set according to the cable insulation class, laying method, and operating standards. The thermal inertia time constant is set to 5 seconds. The initial system temperature is 25 degrees Celsius, the initial operating current is 400 amperes, and in the disturbance intensity function, the power deviation weighting coefficient is set to 0.005, the power change rate weighting coefficient is set to 0.002, and the power fluctuation intensity weighting coefficient is set to 0.005. The current carrying capacity output filter coefficient is set to 0.9, and the thermal carrying capacity filter coefficient is set to 0.8 to improve the stability of the regulation process. The load conditions are set as follows: the target current is about 400 amps in the 0 to 2 second stage; after 2 seconds, it enters the continuous high load operation stage, and the target current increases to about 750 amps, and random disturbances and periodic voltage fluctuations are superimposed to simulate the load surge and fluctuation scenarios in actual operation.

[0078] To verify the effectiveness of the dynamic heat carrying capacity modulation method proposed in this invention, a comparative simulation was conducted between this application and conventional methods. The simulation results may include current response analysis results, temperature response analysis results, heat carrying capacity coefficient analysis results, and maximum allowable current carrying capacity analysis results. The current response analysis results may be as follows: Figure 2 As shown, Figure 2 The diagram shows a comparison of the current carrying capacity correction method for cables based on dynamic thermal carrying capacity modulation proposed in this application. It can be seen that in the initial stage of simulation, the operating current of both the proposed method and the traditional method rises rapidly to meet the load increase demand. The peak current of the traditional method is higher than that of the proposed method, indicating that the traditional method allows for a larger instantaneous current carrying capacity during load surges. As the temperature gradually rises and approaches the constraint boundary, the current of both the proposed method and the traditional method begins to decrease. However, the current decrease process of the proposed method is smoother and slightly lower overall than that of the traditional method. This indicates that the proposed method can adjust the current carrying capacity in advance according to the operating disturbance state to avoid excessive instantaneous thermal shock. Furthermore, the actual operating current of the proposed method is basically consistent with the corrected maximum allowable current carrying capacity curve, indicating that the proposed adjustment mechanism has good tracking performance and stability. The temperature response analysis results can be seen as follows: Figure 3 As shown, Figure 3The temperature response diagram of the cable current-carrying capacity correction method based on dynamic thermal carrying capacity modulation in this application is shown. It can be seen that, like the traditional method, the cable temperature gradually increases from the initial temperature and eventually approaches the set upper temperature limit of 60℃, which conforms to the heat accumulation law under continuous high load operation. Therefore, compared with the traditional method, the temperature rise curve of this application is slightly lower overall, especially in the early stage of the temperature rise, indicating that during the load disturbance stage, this application effectively slows down the temperature rise rate by actively reducing the allowable current-carrying capacity. In the later stable stage, the temperature of both this application and the traditional method gradually approaches the upper limit value, but this application still maintains a certain temperature margin, indicating better thermal safety control capability. The analysis results of the thermal carrying capacity coefficient can be seen as follows: Figure 4 As shown, Figure 4 The graph shows the variation of the thermal carrying capacity coefficient in the cable current-carrying capacity correction method based on dynamic thermal carrying capacity modulation of this application. It can be seen that in the initial stage of the simulation, the system is affected by rapid load changes, and the thermal carrying capacity coefficient drops significantly, reaching a minimum value of approximately 0.75. This indicates that the system's ability to withstand increased thermal load decreases when disturbances intensify. Subsequently, as the operating state gradually stabilizes, the thermal carrying capacity coefficient continuously recovers and eventually approaches 1, while also exhibiting small periodic fluctuations. This phenomenon demonstrates that the thermal carrying capacity coefficient can respond promptly to load disturbance changes, possessing continuous adjustment characteristics rather than fixed threshold control. It can automatically recover its current-carrying capacity after the system stabilizes. Therefore, the thermal carrying capacity coefficient can effectively characterize the thermal carrying capacity state of the cable under dynamic operating conditions. The maximum allowable current-carrying capacity analysis results can be obtained as follows: Figure 5 As shown, Figure 5 The chart shows a comparison of the maximum allowable current carrying capacity of the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation in this application. It can be seen that in the early stage of the simulation when the disturbance is strong, the allowable current carrying capacity calculated by this application is lower than that of the traditional method. This indicates that the system actively adopts a conservative control strategy to reduce the risk of overheating caused by sudden load increases. As the disturbance weakens and the system state stabilizes, the corrected maximum allowable current carrying capacity gradually increases and gradually approaches the result of the traditional method in the middle and later stages. This shows that this application is not a long-term conservative current limiting method, but rather dynamically restores the available current carrying capacity based on the operating state.

[0079] Therefore, the simulation results show that this application can actively suppress current peaks and reduce thermal shock during the load surge phase, slow down the temperature rise rate and increase safety margin during continuous operation, dynamically adjust the allowable current carrying capacity according to the disturbance state instead of fixed conservative control, restore the current carrying capacity after the system stabilizes to improve line utilization, and the adjustment process is continuous and smooth, making it suitable for online real-time applications.

[0080] Based on the first embodiment of this application, in the second embodiment of this application, the same or similar content as the first embodiment described above can be referred to the above description, and will not be repeated hereafter.

[0081] In this embodiment, refer to Figure 6 , Figure 6 This is a flowchart illustrating Embodiment 2 of the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation of this application. Step S40 specifically includes steps S41 to S43: Step S41: Configure corresponding constraint parameter information based on the preset constraint conditions. The constraint parameter information includes equivalent heat capacity, equivalent resistance, comprehensive heat dissipation coefficient, ambient temperature, allowable temperature of cable conductor, and thermal inertia time constant. It should be noted that the constraint parameter information is a pre-configured set of boundary parameters used to define the fixed constraint conditions in the cable thermal balance model. It can be flexibly adjusted according to the actual cable type and operating scenario to ensure adaptability to different working conditions.

[0082] It is understood that the equivalent heat capacity is the equivalent heat storage capacity exhibited by the cable as a whole from the conductor to the outer surface during the thermal process. It characterizes the rate at which the cable's temperature rises after absorbing heat. The larger the equivalent heat capacity value, the slower the temperature rise under the same heating power, and the stronger the thermal inertia. The equivalent resistance is the AC resistance of the cable conductor at the operating temperature, which determines the Joule heating power when current flows. The comprehensive heat dissipation coefficient is the total equivalent coefficient of heat dissipation from the cable surface to the surrounding environment. The ambient temperature is the steady-state temperature of the medium surrounding the cable, which directly affects the cable's heat dissipation capacity. The allowable conductor temperature is the highest conductor temperature allowed by the cable insulation material under long-term safe operating conditions. The thermal inertia time constant is a characteristic parameter characterizing the time scale of the cable's temperature response. It represents the time required for the cable's temperature to rise from the initial value to the final steady-state temperature difference under the action of a step heating power. The larger the thermal inertia time constant, the slower the cable temperature changes and the stronger its tolerance to short-term overload.

[0083] In specific embodiments, the equivalent heat capacity (characterizing the heat storage capacity of the cable body) can be determined based on the cable material and cross-sectional area, the equivalent resistance (characterizing the degree of heat conduction resistance) can be calculated based on the conductor resistance and thermal resistance path, the comprehensive heat dissipation coefficient can be calibrated in combination with the laying environment (air, soil or pipeline) and wind speed, the ambient temperature can be set through field sensors or meteorological data, the allowable temperature of the cable conductor can be determined based on the heat resistance level of the insulation material, and the thermal inertia time constant can be estimated based on the thermal response characteristics of the cable. In this way, the heat accumulation and heat dissipation process of the cable under dynamic load can be accurately simulated, avoiding temperature prediction deviations. Under the premise of ensuring that the cable conductor does not exceed the allowable temperature, the dynamic capacity expansion potential of the line can be fully explored, the power grid transmission efficiency can be improved, and overheating faults can be prevented, ensuring the safe and reliable operation of the power system.

[0084] Step S42: Calculate the current carrying capacity of the reference cable based on the conductor temperature data and the constraint parameter information to determine the current carrying capacity information of the reference cable; It should be noted that the reference cable current carrying capacity information is the maximum current value that the cable is allowed to continuously carry under the current operating conditions. It represents the dynamic current carrying capacity after considering the cable's thermal inertia and heat dissipation conditions, provided that the conductor temperature does not exceed the allowable temperature. It is used to maximize the cable's power transmission efficiency within a safety margin.

[0085] In a specific embodiment, a first temperature difference is determined based on the ambient temperature and the allowable temperature of the cable conductor in the constraint parameter information. That is, the first temperature difference is obtained by the difference between the ambient temperature and the allowable temperature of the cable conductor in the constraint parameter information. This first temperature difference is used to characterize the maximum usable temperature rise margin of the cable from the ambient temperature to the allowable temperature, establish a temperature reference boundary for safe operation, and avoid the current carrying capacity setting being too high or too low due to fluctuations in ambient temperature.

[0086] The second temperature difference is determined based on the allowable temperature of the cable conductor in the constraint parameter information and the conductor temperature data. That is, the second temperature difference is obtained according to the difference between the allowable temperature of the cable conductor and the conductor temperature data. It is used to characterize the margin from the allowable temperature under the current thermal state and can dynamically sense the actual thermal state of the cable.

[0087] Based on the first temperature difference, the second temperature difference, and the equivalent heat capacity, equivalent resistance, comprehensive heat dissipation coefficient, and thermal inertia time constant in the constraint parameter information, the current carrying capacity of the reference cable is calculated to obtain the current carrying capacity information of the reference cable. That is, based on the first temperature difference (maximum temperature rise range), the second temperature difference (remaining temperature rise margin), and constraint parameters such as equivalent heat capacity (heat storage capacity), equivalent resistance (heat source intensity), comprehensive heat dissipation coefficient (heat dissipation efficiency), and thermal inertia time constant (temperature response delay), the current carrying capacity of the reference cable is calculated by solving the thermal circuit differential equation. Under the premise that the conductor temperature does not exceed the allowable temperature, the maximum allowable continuous current is derived in reverse to obtain the current carrying capacity information of the reference cable. This ensures that the conductor temperature never exceeds the limit, effectively extends the cable life and prevents overheating failure, and achieves a dynamic optimization balance between safety and efficiency.

[0088] In one feasible implementation, step S42 may include steps D11-D13: Step D11: Determine the first temperature difference based on the ambient temperature and the allowable temperature of the cable conductor in the constraint parameter information; It should be noted that the first temperature difference is the temperature rise margin of the cable relative to the environment when the conductor temperature is just at the upper limit during steady-state operation. It characterizes the long-term current carrying capacity of the cable without additional heat accumulation and is an indispensable steady-state term.

[0089] Step D12: Determine the second temperature difference based on the allowable temperature of the cable conductor in the constraint parameter information and the conductor temperature data; It should be noted that the second temperature difference is the remaining thermal margin between the current temperature and the upper temperature limit. It can quantify the cable's ability to absorb additional heat in the current state. The larger the second temperature difference, the lower the current temperature and the more sufficient the available transient heat capacity reserve.

[0090] Step D13: Based on the first temperature difference, the second temperature difference, and the equivalent heat capacity, equivalent resistance, comprehensive heat dissipation coefficient, and thermal inertia time constant in the constraint parameter information, the current carrying capacity of the reference cable is calculated to obtain the current carrying capacity information of the reference cable.

[0091] It is understandable that the reference cable current carrying capacity information can integrate steady-state heat dissipation capacity and transient heat capacity utilization capacity to characterize the static allowable current carrying capacity under the current temperature condition, but the influence of operational disturbances is not considered, and further dynamic correction is required through the thermal carrying capacity coefficient.

[0092] Step S43: Correct the current carrying capacity information of the reference cable based on the thermal load capacity coefficient to obtain the cable current carrying capacity correction result.

[0093] It should be noted that the cable current carrying capacity correction result is the maximum allowable current carrying capacity output after being modulated by the dynamic thermal carrying capacity coefficient. It is updated in real time according to the operating status and is used for cable load control, scheduling decision-making or overheating early warning.

[0094] In a specific embodiment, the numerator of the reference cable current-carrying capacity information is adjusted based on the modulation factor corresponding to the thermal carrying capacity coefficient to obtain a corrected numerator. That is, the dynamic thermal carrying capacity coefficient can be used as the modulation factor, with a value range of (0,1]. The modulation factor is used to adjust the numerator of the reference cable current-carrying capacity information to obtain the corrected numerator. The thermal carrying capacity coefficient is used as the modulation factor and directly applied to the numerator to achieve unified scaling of steady-state heat dissipation capacity and transient heat accumulation capacity. When the system disturbance increases, the coefficient decreases and the numerator decreases accordingly. Therefore, it is not necessary to change the equivalent resistance in the denominator, so as to maintain the physical structural integrity of the thermal balance model, which is convenient for engineering understanding and parameter tuning.

[0095] The current-carrying capacity of the reference cable is corrected based on the correction numerator to obtain the cable current-carrying capacity correction result. This is achieved by dividing the adjusted correction numerator by the equivalent resistance in the denominator of the reference current-carrying capacity, and then taking the square root of the quotient. The corrected maximum allowable current-carrying capacity is then output as the cable current-carrying capacity correction result. This allows for automatic derating under high-fluctuation operating conditions to suppress thermal shock, and restoration to near-reference values ​​under stable operating conditions to improve capacity utilization. Furthermore, the entire correction process involves only multiplication, division, and square root operations, resulting in high computational efficiency and suitability for online real-time deployment.

[0096] In one feasible implementation, step S43 may include steps E11-E12: Step E11: Adjust the numerator in the current carrying capacity information of the reference cable based on the modulation factor corresponding to the thermal carrying capacity coefficient to obtain the correction numerator; It should be noted that the corrected numerator is obtained by multiplying the sum of the steady-state heat dissipation term and the transient heat accumulation term by the heat carrying capacity coefficient, thereby realizing the dynamic scaling of the original numerator, so that the current carrying capacity calculated by square root can change in real time with the disturbance intensity, while keeping the physical structure of the numerator unchanged, which is convenient for engineering implementation and parameter adjustment.

[0097] Step E12: Correct the current carrying capacity information of the reference cable based on the correction numerator to obtain the cable current carrying capacity correction result.

[0098] It is understood that the cable current carrying capacity correction result can characterize the ability of the current carrying capacity to adaptively adjust with the operating disturbance state, that is, automatically derating to suppress thermal shock during high disturbances, and restoring capacity to improve utilization during stable conditions. It is highly efficient and suitable for online real-time applications.

[0099] This embodiment proposes a cable current-carrying capacity correction method based on dynamic thermal carrying capacity modulation. The method configures corresponding constraint parameter information based on preset constraint conditions. The constraint parameter information includes equivalent heat capacity, equivalent resistance, comprehensive heat dissipation coefficient, ambient temperature, allowable temperature of the cable conductor, and thermal inertia time constant. Based on the conductor temperature data and the constraint parameter information, the current-carrying capacity of a reference cable is calculated to determine the reference cable current-carrying capacity information. Finally, the current-carrying capacity information of the reference cable is corrected based on the thermal carrying capacity coefficient to obtain the cable current-carrying capacity correction result. This invention solves the technical problem of how to accurately correct the current carrying capacity of cables under disturbed operating conditions. Compared with existing technologies, this application configures corresponding constraint parameter information according to preset constraint conditions to provide a fixed benchmark that conforms to actual thermal characteristics. Combined with conductor temperature data, the benchmark cable current carrying capacity information is calculated, which can characterize the basic current carrying capacity under the combined effect of steady-state heat dissipation and transient heat accumulation at the current temperature. By using the thermal carrying capacity coefficient to correct the benchmark cable current carrying capacity information, dynamic scaling of the benchmark value can be achieved, enabling the current carrying capacity to adaptively adjust with the operating disturbance state. This allows for automatic derating under high disturbance conditions to suppress thermal shock and overheating risks, and restoration to near the benchmark value under stable operating conditions to improve line capacity utilization, achieving a dynamic balance between safety and utilization.

[0100] For example, to help understand the implementation process of the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation obtained by combining this embodiment with the above embodiment one, please refer to Figure 7 , Figure 7A simplified flowchart of a cable current-carrying capacity correction method based on dynamic thermal carrying capacity modulation is provided, specifically: It can collect operational data in real time, including voltage, current, and temperature data during cable operation, accurately capturing the actual impact of load fluctuations on the thermal process, improving the real-time performance and accuracy of state perception. Based on the operational data, it calculates power characteristics, including power deviation, power change rate, and power fluctuation standard deviation, among other disturbance characteristics. Through multi-dimensional quantification of system instability, it comprehensively characterizes the disturbance intensity and calculates it by constructing a comprehensive disturbance intensity function Φ(t). This function weights and fuses disturbance characteristics of different dimensions into a single scalar, maintaining differentiated response capabilities to different disturbance factors, thereby calculating the thermal load capacity coefficient. The current carrying capacity falls strictly within the (0,1] interval, monotonically decreasing with increasing disturbance and automatically recovering with decreasing disturbance, thus achieving continuous and adaptive current-carrying capacity modulation. At this point, the reference cable current carrying capacity under preset constraints can be corrected to obtain the dynamic maximum allowable current carrying capacity. This means that the cable current carrying capacity correction result is obtained. Without changing the thermal balance physical structure, the allowable current carrying capacity can be actively derated during high disturbances to suppress thermal shock, and the capacity can be restored during stable conditions to improve line utilization. The cable current carrying capacity correction result is output, realizing the real-time and smooth adaptive adjustment of the cable current carrying capacity according to the operating status.

[0101] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation of this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0102] This application also provides a cable current-carrying capacity correction device based on dynamic thermal load capacity modulation, please refer to... Figure 8 The cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation includes: The acquisition module 10 is used to acquire voltage data, current data, and conductor temperature data during cable operation; Processing module 20 is used to process the disturbance characteristic parameters based on the operating power of the voltage data and the current data, and determine the disturbance characteristic parameter information; The processing module 20 is also used to determine the thermal load capacity coefficient information based on the power deviation, power change rate and power fluctuation standard deviation in the disturbance characteristic parameter information; The execution module 30 is used to correct the current carrying capacity of the reference cable under preset constraints based on the thermal carrying capacity coefficient and the conductor temperature data, and obtain the cable current carrying capacity correction result.

[0103] The processing module 20 is also used to acquire runtime information; The operating power is obtained by multiplying the voltage data and the current data based on the operating time information. The disturbance characteristic parameters are processed based on the running time information and the running power to determine the disturbance characteristic parameter information.

[0104] The processing module 20 is further configured to determine the average allowable power based on the running time information and the running power; The power deviation is determined by calculating the difference between the operating power and the average allowable power based on the operating time information. The rate of change of power is determined by solving the derivative of the operating power with respect to the operating time information. The standard deviation of the operating power is calculated based on the operating time information to determine the standard deviation of power fluctuation; The disturbance characteristic parameter information is obtained based on the power deviation, the power change rate, and the power fluctuation standard deviation.

[0105] The processing module 20 is also used to perform a weighted summation of the power deviation, power change rate and power fluctuation standard deviation in the disturbance characteristic parameter information with a preset weighting coefficient to obtain a comprehensive disturbance intensity value; Based on the comprehensive disturbance intensity value, the thermal bearing capacity coefficient within the preset range is calculated to obtain the thermal bearing capacity coefficient information.

[0106] The execution module 30 is also used to configure corresponding constraint parameter information based on the preset constraint conditions. The constraint parameter information includes equivalent heat capacity, equivalent resistance, comprehensive heat dissipation coefficient, ambient temperature, allowable temperature of cable conductor, and thermal inertia time constant. The current carrying capacity of the reference cable is calculated based on the conductor temperature data and the constraint parameter information to determine the current carrying capacity information of the reference cable; The current carrying capacity information of the reference cable is corrected based on the thermal load capacity coefficient to obtain the cable current carrying capacity correction result.

[0107] The execution module 30 is further configured to determine a first temperature difference based on the ambient temperature and the allowable temperature of the cable conductor in the constraint parameter information; The second temperature difference is determined based on the cable conductor's allowable temperature and the conductor temperature data in the constraint parameter information. The current carrying capacity of the reference cable is calculated based on the first temperature difference, the second temperature difference, and the equivalent heat capacity, equivalent resistance, comprehensive heat dissipation coefficient, and thermal inertia time constant in the constraint parameter information to obtain the current carrying capacity information of the reference cable.

[0108] The execution module 30 is further configured to adjust the numerator in the reference cable current carrying capacity information based on the modulation factor corresponding to the thermal load capacity coefficient to obtain a correction numerator; The current carrying capacity information of the reference cable is corrected based on the correction numerator to obtain the cable current carrying capacity correction result.

[0109] The cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation provided in this application, employing the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation in the above embodiments, can solve the technical problem of how to accurately correct the cable current carrying capacity under disturbance conditions. Compared with the prior art, the beneficial effects of the cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation provided in this application are the same as those of the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation provided in the above embodiments, and other technical features in the cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0110] This application provides a cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation. The cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation in the above embodiment 1.

[0111] The following is for reference. Figure 9 This document illustrates a structural schematic diagram of a cable current-carrying capacity modulation-based device suitable for implementing embodiments of this application. The cable current-carrying capacity modulation-based device in the embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), and in-vehicle terminals (e.g., in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. Figure 9 The cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0112] like Figure 9As shown, the cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation may include a processing unit 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in ROM (Read Only Memory) 1002 or a program loaded from storage device 1003 into RAM (Random Access Memory) 1004. RAM 1004 also stores various programs and data required for the operation of the cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via bus 1005. Input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input devices 1007 including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices 1008 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 1003 including, for example, magnetic tapes, hard disks, etc.; and communication devices 1009. Communication device 1009 allows the cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows a cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation with various systems, it should be understood that it is not required to implement or possess all the systems shown. More or fewer systems can be implemented or possessed alternatively.

[0113] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0114] The cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation provided in this application, employing the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation in the above embodiments, can solve the technical problem of how to accurately correct the cable current carrying capacity under disturbance conditions. Compared with the prior art, the beneficial effects of the cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation provided in this application are the same as the beneficial effects of the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation provided in the above embodiments, and other technical features in this cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation are the same as those disclosed in the previous embodiment method, and will not be repeated here.

[0115] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0116] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0117] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation in the above embodiments.

[0118] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0119] The aforementioned computer-readable storage medium may be included in a cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation; or it may exist independently and not assembled into a cable current carrying capacity correction device based on dynamic thermal carrying capacity modulation.

[0120] The aforementioned computer-readable storage medium carries one or more programs. When these programs are executed by a cable current-carrying capacity correction device based on dynamic thermal carrying capacity modulation, the cable current-carrying capacity correction device based on dynamic thermal carrying capacity modulation performs the following actions: acquires voltage data, current data, and conductor temperature data during cable operation; processes disturbance characteristic parameters based on the operating power of the voltage data and the current data to determine disturbance characteristic parameter information; determines thermal carrying capacity coefficient information based on the power deviation, power change rate, and power fluctuation standard deviation in the disturbance characteristic parameter information; and corrects the reference cable current-carrying capacity under preset constraint conditions based on the thermal carrying capacity coefficient and the conductor temperature data to obtain a cable current-carrying capacity correction result.

[0121] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0122] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0123] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0124] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described cable current-carrying capacity correction method based on dynamic thermal carrying capacity modulation. This solves the technical problem of how to accurately correct cable current-carrying capacity under disturbance conditions. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the cable current-carrying capacity correction method based on dynamic thermal carrying capacity modulation provided in the above embodiments, and will not be repeated here.

[0125] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A cable current-carrying capacity correction method based on dynamic thermal carrying capacity modulation, characterized in that, The method includes: Acquire voltage, current, and conductor temperature data during cable operation; Based on the operating power of the voltage and current data, the disturbance characteristic parameters are processed to determine the disturbance characteristic parameter information; The thermal load capacity coefficient information is determined based on the power deviation, power change rate and power fluctuation standard deviation in the disturbance characteristic parameter information. Based on the thermal carrying capacity coefficient and the conductor temperature data, the current carrying capacity of the reference cable under preset constraints is corrected to obtain the cable current carrying capacity correction result.

2. The method as described in claim 1, characterized in that, The step of processing disturbance characteristic parameters and determining disturbance characteristic parameter information based on the operating power of the voltage data and the current data includes: Obtain runtime information; The operating power is obtained by multiplying the voltage data and the current data based on the operating time information. The disturbance characteristic parameters are processed based on the running time information and the running power to determine the disturbance characteristic parameter information.

3. The method as described in claim 2, characterized in that, The step of processing the disturbance characteristic parameters based on the running time information and the running power to determine the disturbance characteristic parameter information includes: The average allowable power is determined based on the running time information and the running power. Based on the running time information, the difference between the running power and the average allowable power is calculated to determine the power deviation; The rate of change of power is determined by solving the derivative of the operating power with respect to the operating time information. The standard deviation of the operating power is calculated based on the operating time information to determine the standard deviation of power fluctuation; The disturbance characteristic parameter information is obtained based on the power deviation, the power change rate, and the power fluctuation standard deviation.

4. The method as described in claim 1, characterized in that, The step of determining the thermal carrying capacity coefficient information based on the power deviation, power change rate, and power fluctuation standard deviation in the disturbance characteristic parameter information includes: The comprehensive disturbance intensity value is obtained by weighting and summing the power deviation, power change rate, and power fluctuation standard deviation in the disturbance characteristic parameter information with preset weighting coefficients. Based on the comprehensive disturbance intensity value, the thermal bearing capacity coefficient within the preset range is calculated to obtain the thermal bearing capacity coefficient information.

5. The method as described in claim 1, characterized in that, The step of correcting the current carrying capacity of the reference cable under preset constraints based on the thermal carrying capacity coefficient and the conductor temperature data to obtain the cable current carrying capacity correction result includes: Based on the preset constraint conditions, the corresponding constraint parameter information is configured. The constraint parameter information includes equivalent heat capacity, equivalent resistance, comprehensive heat dissipation coefficient, ambient temperature, allowable temperature of cable conductor, and thermal inertia time constant. The current carrying capacity of the reference cable is calculated based on the conductor temperature data and the constraint parameter information to determine the current carrying capacity information of the reference cable; The current carrying capacity information of the reference cable is corrected based on the thermal load capacity coefficient to obtain the cable current carrying capacity correction result.

6. The method as described in claim 5, characterized in that, The step of calculating the current carrying capacity of the reference cable based on the conductor temperature data and the constraint parameter information to determine the current carrying capacity information of the reference cable includes: The first temperature difference is determined based on the ambient temperature and the allowable temperature of the cable conductor in the constraint parameter information. The second temperature difference is determined based on the allowable temperature of the cable conductor in the constraint parameter information and the conductor temperature data. The current carrying capacity of the reference cable is calculated based on the first temperature difference, the second temperature difference, and the equivalent heat capacity, equivalent resistance, comprehensive heat dissipation coefficient, and thermal inertia time constant in the constraint parameter information to obtain the current carrying capacity information of the reference cable.

7. The method as described in claim 5, characterized in that, The step of correcting the current-carrying capacity information of the reference cable based on the thermal load capacity coefficient to obtain the cable current-carrying capacity correction result includes: The numerator in the current carrying capacity information of the reference cable is adjusted based on the modulation factor corresponding to the thermal carrying capacity coefficient to obtain the correction numerator. The current carrying capacity information of the reference cable is corrected based on the correction numerator to obtain the cable current carrying capacity correction result.

8. A cable current-carrying capacity correction device based on dynamic thermal load capacity modulation, characterized in that, The device includes: The data acquisition module is used to acquire voltage data, current data, and conductor temperature data during cable operation. The processing module is used to process the disturbance characteristic parameters based on the operating power of the voltage data and the current data, and determine the disturbance characteristic parameter information; The processing module is also used to determine the thermal load capacity coefficient information based on the power deviation, power change rate and power fluctuation standard deviation in the disturbance characteristic parameter information; The execution module is used to correct the current carrying capacity of the reference cable under preset constraints based on the thermal carrying capacity coefficient and the conductor temperature data, and obtain the cable current carrying capacity correction result.

9. A cable current-carrying capacity correction device based on dynamic thermal carrying capacity modulation, characterized in that, The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation as described in any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the cable current carrying capacity correction method based on dynamic thermal carrying capacity modulation as described in any one of claims 1 to 7.

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