A parameter monitoring method, device, apparatus and storage medium

Abstract

Embodiments of the present application disclose a parameter monitoring method, device, equipment and storage medium. The method comprises obtaining an environmental thermal parameter calculation formula, obtaining a cable skin temperature and an environmental temperature of a target cable at a target time point; determining a cable metal sheath temperature of the target cable at the target time point according to the cable skin temperature and cable load data of the target cable at the target time point; and determining an equivalent environmental thermal parameter of the target cable at each preset time interval according to the environmental thermal parameter calculation formula, the cable skin temperature, the environmental temperature and the cable metal sheath temperature of the target cable at the target time point, so as to provide the current equivalent environmental thermal parameter of the target cable to a target user. The technical scheme of the embodiments of the present application provides a calculation method of an equivalent environmental thermal parameter of a cable external environment based on historical measurement data, and realizes the effect of accurate measurement of real-time equivalent environmental thermal parameters.

Description

Technical Field

[0001] The embodiments of the present invention relate to computer data processing technology, and more particularly to a parameter monitoring method, apparatus, device and storage medium. Background Technology

[0002] Accurate acquisition of environmental thermal parameters is crucial for calculating current-carrying capacity during cable planning. However, a reliable standard for environmental thermal parameter values ​​is currently lacking. This leads to the widespread adoption of the IEC (International Electrotechnical Commission) recommended environmental thermal parameter calculation method during cable planning, often selecting the most conservative results. During cable operation, considering the heating effect of the cable on the environment, environmental thermal parameters change with the cable's operating time. Existing soil thermal resistance testing equipment provides a fixed value for soil thermal resistance measurement, failing to consider the changing characteristics of soil thermal resistance parameters during cable operation. Furthermore, research on monitoring technologies for changing environmental thermal parameters is currently lacking.

[0003] In order to accurately calculate the current carrying capacity of cables during cable planning, it is necessary to study a method for measuring real-time environmental thermal parameters that are affected by the operation of cables. Summary of the Invention

[0004] This invention provides a parameter monitoring method, apparatus, device, and storage medium to provide a method for calculating the equivalent environmental thermal parameters of the cable's external environment based on historical measurement data, thereby achieving accurate measurement of the real-time equivalent environmental thermal parameters.

[0005] In a first aspect, embodiments of the present invention provide a parameter monitoring method, the method comprising:

[0006] Obtain the user-inputted environmental thermal parameter calculation formula that matches the external laying environment of the target cable. The environmental thermal parameter calculation formula is used to calculate the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable.

[0007] The cable sheath temperature and ambient temperature of the target cable collected within a preset time period before the current time are obtained, and the cable sheath temperature and ambient temperature of the target cable at the target time point corresponding to each preset time period are determined according to each preset time period.

[0008] Based on the cable sheath temperature and cable load data of the target cable at the target time points corresponding to each preset time interval within the preset time period, the cable metal sheath temperature of the target cable at the target time points corresponding to each preset time interval within the preset time period is determined.

[0009] Based on the environmental thermal parameter calculation formula, the cable sheath temperature, ambient temperature, and cable metal sheath temperature of the target cable at the target time point corresponding to each preset time interval within the preset duration, the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval are determined.

[0010] Based on the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval, determine the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable.

[0011] The current equivalent environmental thermal parameters are provided to the target user.

[0012] Secondly, embodiments of the present invention also provide a parameter monitoring device, the device comprising:

[0013] An environmental thermal parameter calculation formula acquisition module is used to acquire an environmental thermal parameter calculation formula input by the user that matches the external laying environment of the target cable. The environmental thermal parameter calculation formula is used to calculate the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable.

[0014] The cable sheath temperature and ambient temperature determination module is used to acquire the cable sheath temperature and ambient temperature of the target cable collected within a preset time period before the current time, and to determine the cable sheath temperature and ambient temperature of the target cable at the target time point corresponding to each preset time period within the preset time period according to each preset time interval.

[0015] The cable metal sheath temperature determination module is used to determine the cable metal sheath temperature of the target cable at each preset time point within the preset time period based on the cable sheath temperature and cable load data of the target cable at each preset time point within the preset time period.

[0016] The equivalent environmental thermal parameter determination module is used to determine the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval based on the environmental thermal parameter calculation formula, the cable sheath temperature, ambient temperature, and cable metal sheath temperature of the target cable at the target time point corresponding to each preset time interval within the preset time period.

[0017] The current equivalent environmental thermal parameter determination module is used to determine the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable based on the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval.

[0018] The current equivalent environmental thermal parameter providing module is used to provide the current equivalent environmental thermal parameters to the target user.

[0019] Thirdly, embodiments of the present invention also provide an electronic device, the electronic device comprising:

[0020] One or more processors;

[0021] Storage device for storing one or more programs;

[0022] When the one or more programs are executed by the one or more processors, the one or more processors implement the parameter monitoring method as described in any embodiment of the present invention.

[0023] Fourthly, embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the parameter monitoring method as described in any embodiment of the present invention.

[0024] This invention provides a method for calculating the equivalent environmental thermal parameters of a cable by obtaining the cable sheath temperature and ambient temperature at a target time point within a preset time period using an environmental thermal parameter calculation formula. Based on the cable sheath temperature and cable load data at the target time point within the preset time period, the cable metal sheath temperature at each preset time interval within the preset time period is determined. Then, based on the environmental thermal parameter calculation formula, the cable sheath temperature, ambient temperature, and cable metal sheath temperature at the target time point within the preset time period corresponding to each preset time interval, the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval are determined. This determines the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable. The current equivalent environmental thermal parameters are then provided to the target user, providing a method for calculating the equivalent environmental thermal parameters of the cable's external environment based on historical measurement data, achieving accurate measurement of real-time equivalent environmental thermal parameters. Attached Figure Description

[0025] Figure 1a This is a flowchart of a parameter monitoring method provided in Embodiment 1 of the present invention;

[0026] Figure 1b This is a schematic diagram of a thermal circuit model provided in Embodiment 1 of the present invention;

[0027] Figure 1c This is a schematic diagram of a transient thermal circuit model provided in Embodiment 1 of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of a parameter monitoring device provided in Embodiment 2 of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of an electronic device provided in Embodiment 3 of the present invention. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0031] Example 1

[0032] Figure 1a This is a flowchart of a parameter monitoring method provided in Embodiment 1 of the present invention. This embodiment is applicable to monitoring the equivalent environmental thermal parameters of cable laying environments. The method can be executed by a parameter monitoring device, which can be implemented using software and / or hardware. The device can be configured in a server. The method specifically includes:

[0033] S110. Obtain the calculation formula for environmental thermal parameters that match the external laying environment of the target cable, as input by the user.

[0034] The external laying environment refers to the underground laying environment of the target cable. The formula for calculating environmental thermal parameters can be derived in advance based on the thermal path model corresponding to the external laying environment of the target cable. This formula can be used to calculate the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable. Environmental thermal parameters may include environmental heat capacity and environmental thermal resistance.

[0035] In this embodiment, a calculation formula for environmental thermal parameters that match the external laying environment of the target cable, input by the user, can be obtained.

[0036] The formula for calculating environmental thermal parameters can be derived from the thermal path model from the outer surface of the target cable to the external environment.

[0037] For example, Figure 1b This is a schematic diagram of a thermal circuit model provided in Embodiment 1 of the present invention, wherein P s P represents the heat flow through the thermal resistance of the cable's outer sheath; c P represents the heat flow absorbed by the external environment. e This represents the heat flow rate across the external thermal resistance. t n t indicates the temperature of the cable's metal sheath. n+1 Indicates the temperature of the cable sheath; t e Indicates ambient temperature; R n R represents the thermal resistance of the cable's outer sheath. e Indicates ambient thermal resistance; C e Indicates ambient heat capacity; Cn Indicates the heat capacity of the cable's outer sheath; C n This indicates the heat capacity of the metal jacket.

[0038] S120. Obtain the cable sheath temperature and ambient temperature of the target cable collected within a preset time period before the current time, and determine the cable sheath temperature and ambient temperature of the target cable at the target time point corresponding to each preset time period within the preset time period according to each preset time interval.

[0039] The preset duration can refer to a pre-defined time period preceding the current moment. The target time points can refer to multiple different time points between the current moment; for example, there can be three target time points: n, n+1, and n+2, where the three time points are ordered by time sequence: n is earlier than n+1, which is earlier than n+2. The preset time interval can refer to the time interval between different target time points; in this embodiment, multiple time intervals of different durations can be set.

[0040] In this embodiment, multiple cable sheath temperatures and ambient temperatures of the target cable collected in real time within a preset time period before the current moment can be obtained. Based on multiple different preset time intervals, the cable sheath temperatures and ambient temperatures at different target time points corresponding to multiple different preset time intervals can be determined from the multiple cable sheath temperatures and ambient temperatures obtained.

[0041] In an optional embodiment of this example, determining the cable sheath temperature and ambient temperature of the target cable at target time points corresponding to each preset time interval within the preset duration, based on each preset time interval, may include:

[0042] Perform the following operations for each preset time interval:

[0043] According to a preset time interval, within the preset duration, a first target time point, a second target time point, and a third target time point corresponding to the preset time interval are acquired; from the cable sheath temperatures of the target cable collected within the preset duration, the cable sheath temperatures of the target cable at the first target time point, the second target time point, and the third target time point corresponding to the preset time interval are acquired; from the ambient temperatures of the target cable collected within the preset duration, the ambient temperatures of the target cable at the first target time point and the second target time point corresponding to the preset time interval are acquired.

[0044] The first target time point can be the target time point farthest from the current time, such as time n in the previous example. The second target time point can be the target time point that is the second farthest from the current time, such as time n+1 in the previous example. The third target time point can be the target time point that is closest to the current time, such as time n+2 in the previous example.

[0045] In this embodiment, for a single preset time interval, a first target time point, a second target time point, and a third target time point corresponding to the preset time interval immediately preceding the current time point can be obtained within a preset duration. The cable sheath temperature and the ambient temperature at the first and second target time points are also obtained for each of these three target time points. Specifically, the first cable sheath temperature and the first ambient temperature correspond to the first target time point; the second cable sheath temperature and the second ambient temperature correspond to the second target time point; and the third cable sheath temperature corresponds to the third target time point.

[0046] S130. Based on the cable sheath temperature and cable load data of the target cable at the target time points corresponding to each preset time interval within the preset duration, determine the cable metal sheath temperature of the target cable at the target time points corresponding to each preset time interval within the preset duration.

[0047] The cable load data may include the thermal resistance R of the cable outer sheath. n and the heat flow P passing through the thermal resistance of the cable outer sheath s The temperature of the cable's metallic sheath can be expressed by the expression t. n =P s R n +t n+1 get.

[0048] In this embodiment, the matching cable metal sheath temperature can be determined by using the calculation expression of the cable metal sheath temperature based on the cable sheath temperature and cable load data of the target cable at the target time point corresponding to each preset time interval within a preset time period.

[0049] Optionally, determining the cable metal sheath temperature of the target cable at each preset time point within the preset time period, based on the cable sheath temperature and cable load data of the target cable at each preset time interval within the preset time period, includes:

[0050] Perform the following operations for each preset time interval:

[0051] Based on the cable sheath temperature and cable load data of the target cable at the first and second target time points corresponding to the preset time interval, the cable metal sheath temperature of the target cable at the first and second target time points corresponding to the preset time interval is calculated.

[0052] In this embodiment, for a single preset time interval, the cable sheath temperature and cable load data at the first target time point and the second target time point corresponding to the current preset time interval within the preset duration can be calculated based on the calculation expression for the cable metal sheath temperature, and the first metal sheath temperature and the second metal sheath temperature at the first target time point and the second target time point.

[0053] S140. Based on the environmental thermal parameter calculation formula, the cable sheath temperature, ambient temperature, and cable metal sheath temperature of the target cable at the target time point corresponding to each preset time interval within the preset duration, determine the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval.

[0054] The equivalent environmental thermal parameters include environmental heat capacity and environmental thermal resistance. The formulas for calculating environmental thermal parameters may include the environmental thermal resistance R. e The calculation formula and environmental heat capacity C e The calculation formula.

[0055] Specifically, based on the external environment of the target cable, a thermal path model from the outer surface of the target cable to the external environment can be constructed. The equivalent thermal path of the cable's external environment can be regarded as a port network. By mathematically transforming the input and output variables of the port network, the internal parameters of the port network can be solved. Considering the influence of environmental variables on the heat dissipation thermal resistance and heat capacity of the cable's external environment, and combining the definitions of thermal resistance and heat capacity in heat transfer and the law of conservation of heat, the thermal path equation (1) matching the external environment of the target cable is obtained:

[0056]

[0057] Simplifying equation (1) yields equation (2):

[0058] Equation (2) has two parameters to be determined. We select three time points n, n+1 and n+2 with a time interval of h, and use the finite difference method to transform equation (2) into the following system of equations (3):

[0059]

[0060] Simplifying equation (3) yields equation (4) for calculating the environmental thermal resistance of the cable's external environment based on historical measurement data:

[0061]

[0062] And the formula for calculating the ambient heat capacity (5):

[0063]

[0064] Among them, R e C is the ambient thermal resistance corresponding to the external laying environment of the target cable at a preset time interval. e R is the ambient heat capacity corresponding to the external laying environment of the target cable at a preset time interval. n The outer sheath thermal resistance of the target cable is given by h, where h is a preset time interval. The cable sheath temperature of the target cable at the first target time point corresponding to the preset time interval. The cable sheath temperature of the target cable at the second target time point corresponding to the preset time interval. The cable sheath temperature of the target cable at the third target time point corresponding to the preset time interval. The ambient temperature of the target cable at the first target time point corresponding to the preset time interval. The ambient temperature of the target cable at the second target time point corresponding to the preset time interval. The temperature of the metal sheath of the target cable at the first target time point corresponding to the preset time interval. The temperature of the metal sheath of the target cable at the second target time point corresponding to the preset time interval is denoted as .

[0065] In this embodiment, for each preset time interval, the environmental heat capacity and environmental thermal resistance corresponding to the external laying environment of the target cable can be calculated according to the environmental thermal parameter calculation formula.

[0066] S150. Determine the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable based on the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval.

[0067] The current equivalent environmental thermal parameters can be determined based on different equivalent environmental thermal parameters under different preset time intervals.

[0068] Optionally, based on the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval, the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable are determined. Specifically, based on preset abnormal data identification rules, abnormal environmental thermal capacity and abnormal environmental thermal resistance are filtered out from the environmental thermal capacity and environmental thermal resistance corresponding to the external laying environment of the target cable at each preset time interval; the average value of the remaining environmental thermal capacity is calculated, and the average value is determined as the current environmental thermal capacity corresponding to the external laying environment of the target cable; the average value of the remaining environmental thermal resistance is calculated, and the average value is determined as the current environmental thermal resistance corresponding to the external laying environment of the target cable.

[0069] Among them, the abnormal data identification rule can refer to the rule for identifying abnormal equivalent environmental thermal parameters from multiple equivalent environmental thermal parameters under multiple different preset time intervals, such as the Raida criterion.

[0070] In this embodiment, abnormal environmental thermal capacity and abnormal environmental thermal resistance can be removed from the environmental thermal capacity and environmental thermal resistance corresponding to the external laying environment of the target cable at each preset time interval according to the abnormal data identification rules. Then, the average value of each remaining environmental thermal capacity and environmental thermal resistance is calculated to obtain the current environmental thermal capacity and current environmental thermal resistance corresponding to the external laying environment of the target cable.

[0071] S160. Provide the current equivalent environmental thermal parameters to the target user.

[0072] In this embodiment, the current equivalent environmental thermal parameters can be provided to the target user through a parameter display page.

[0073] The technical solution of this invention obtains the cable sheath temperature and ambient temperature of the target cable at a target time point within a preset time period by acquiring an environmental thermal parameter calculation formula; based on the cable sheath temperature and cable load data at the target time point within the preset time period, the cable metal sheath temperature of the target cable at each preset time interval within the preset time period is determined; thereby, based on the environmental thermal parameter calculation formula, the cable sheath temperature, ambient temperature, and cable metal sheath temperature at the target time point within the preset time period corresponding to each preset time interval, the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval are determined, thus determining the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable; and providing the current equivalent environmental thermal parameters to the target user, providing a method for calculating the equivalent environmental thermal parameters of the cable's external environment based on historical measurement data, achieving the effect of accurate measurement of real-time equivalent environmental thermal parameters.

[0074] Based on the above technical solution, after determining the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable according to the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval, it is preferable to further include:

[0075] Substitute the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable into the thermal balance equation corresponding to the target cable to obtain the current cable conductor temperature of the target cable.

[0076] For example, Figure 1c This is a schematic diagram of a transient thermal circuit model provided in Embodiment 1 of the present invention, wherein t1 represents the temperature of the cable conductor (°C); t2 represents the temperature of the insulation layer (°C); t3 represents the temperature of the wrapping layer (°C); t4 represents the temperature of the air gap layer (°C); t5 represents the temperature of the cable metal sheath (°C); t6 represents the temperature of the cable outer sheath (°C); t e Cable external ambient temperature (°C); C1 represents the heat capacity of the cable conductor (J / K); C2 represents the heat capacity of the cable main insulation (including inner and outer shielding) (J / K); C3 represents the heat capacity of the wrapping layer (including expansion band) (J / K); C4 represents the heat capacity of the air gap layer (J / K); C5 represents the heat capacity of the cable metal sheath (J / K); C6 represents the heat capacity of the cable outer sheath (including anti-corrosion layer) (J / K); C e Equivalent heat capacity of the cable's external laying environment (J / K); R1 represents the thermal resistance of the cable conductor (K / W); R2 represents the thermal resistance of the cable's main insulation (including inner and outer shielding) (K / W); R3 represents the thermal resistance of the wrapping layer (including expansion band) (K / W); R4 represents the thermal resistance of the air gap layer (K / W); R5 represents the thermal resistance of the outer sheath (K / W); R e The thermal resistance (K / W) of the medium between the outer surface of the cable and the boundary of the external environment; P1 represents the loss of the cable conductor (W); P2 represents the loss of each layer of the insulation and inner and outer shielding medium (W); P5 represents the loss of the cable metal sheath (W). Since the thermal conductivity of the metal sheath is 2 to 3 orders of magnitude higher than that of other non-metallic structures, and its thickness is small, the thermal resistance of the metal sheath is ignored in the model. According to the heat balance equation, we can obtain equation (6):

[0077]

[0078] Equation (6) can be rearranged to obtain equation (7):

[0079] in,

[0080]

[0081] make t = [t1 t2 … t6]T P = [P1 P2 … t] e / R e ] T Then equation (7) is transformed into equation (8): The temperature of the cable conductor can be obtained by solving equation (8) using MATLAB.

[0082] The advantage of this setup is that it allows for accurate real-time acquisition of the cable conductor temperature.

[0083] Example 2

[0084] Figure 2 This is a schematic diagram of a parameter monitoring device provided in Embodiment 2 of the present invention. This device can execute the parameter monitoring methods involved in the above embodiments. (Reference) Figure 2 The device may include: an environmental thermal parameter calculation formula acquisition module 210, a cable sheath temperature and ambient temperature determination module 220, a cable metal sheath temperature determination module 230, an equivalent environmental thermal parameter determination module 240, a current equivalent environmental thermal parameter determination module 250, and a current equivalent environmental thermal parameter provision module 260. Wherein:

[0085] The environmental thermal parameter calculation formula acquisition module 210 is used to acquire the environmental thermal parameter calculation formula input by the user that matches the external laying environment of the target cable. The environmental thermal parameter calculation formula is used to calculate the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable.

[0086] The cable sheath temperature and ambient temperature determination module 220 is used to acquire the cable sheath temperature and ambient temperature of the target cable collected within a preset time period before the current time, and determine the cable sheath temperature and ambient temperature of the target cable at the target time point corresponding to each preset time period within the preset time period according to each preset time interval.

[0087] The cable metal sheath temperature determination module 230 is used to determine the cable metal sheath temperature of the target cable at each preset time point within the preset time period based on the cable sheath temperature and cable load data of the target cable at each preset time point within the preset time period.

[0088] The equivalent environmental thermal parameter determination module 240 is used to determine the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval based on the environmental thermal parameter calculation formula, the cable sheath temperature, ambient temperature and cable metal sheath temperature of the target cable at the target time point corresponding to each preset time interval within the preset time period.

[0089] The current equivalent environmental thermal parameter determination module 250 is used to determine the current equivalent environmental thermal parameter corresponding to the external laying environment of the target cable based on the equivalent environmental thermal parameter corresponding to the external laying environment of the target cable at each preset time interval.

[0090] The current equivalent environmental thermal parameter providing module 260 is used to provide the current equivalent environmental thermal parameters to the target user.

[0091] The technical solution of this invention obtains the cable sheath temperature and ambient temperature of the target cable at a target time point within a preset time period by acquiring an environmental thermal parameter calculation formula; based on the cable sheath temperature and cable load data at the target time point within the preset time period, the cable metal sheath temperature of the target cable at each preset time interval within the preset time period is determined; thereby, based on the environmental thermal parameter calculation formula, the cable sheath temperature, ambient temperature, and cable metal sheath temperature at the target time point within the preset time period corresponding to each preset time interval, the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval are determined, thus determining the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable; and providing the current equivalent environmental thermal parameters to the target user, providing a method for calculating the equivalent environmental thermal parameters of the cable's external environment based on historical measurement data, achieving the effect of accurate measurement of real-time equivalent environmental thermal parameters.

[0092] Optionally, the cable sheath temperature and ambient temperature determination module 220 in the above-mentioned device can be used for:

[0093] Perform the following operations for each preset time interval:

[0094] According to a preset time interval, within the preset duration, a first target time point, a second target time point, and a third target time point corresponding to the preset time interval are obtained;

[0095] From the cable sheath temperatures of the target cable collected within the preset time period, the cable sheath temperatures of the target cable at the first target time point, the second target time point, and the third target time point corresponding to the preset time interval are obtained;

[0096] From the ambient temperatures of the target cable collected within the preset time period, the ambient temperatures of the target cable at the first target time point and the second target time point corresponding to the preset time interval are obtained.

[0097] Optionally, the cable metal sheath temperature determination module 230 in the above-mentioned device can be used for:

[0098] Perform the following operations for each preset time interval:

[0099] Based on the cable sheath temperature and cable load data of the target cable at the first and second target time points corresponding to the preset time interval, the cable metal sheath temperature of the target cable at the first and second target time points corresponding to the preset time interval is calculated.

[0100] Optionally, in the above-mentioned device, the equivalent environmental thermal parameters include environmental heat capacity and environmental thermal resistance;

[0101] The equivalent environment thermal parameter determination module 240 can be used specifically for:

[0102] Perform the following operations for each preset time interval:

[0103] Calculate the environmental heat capacity and environmental thermal resistance corresponding to the external laying environment of the target cable at a preset time interval using the environmental thermal parameter calculation formula described below:

[0104]

[0105]

[0106] Among them, R e C is the ambient thermal resistance corresponding to the external laying environment of the target cable at a preset time interval. e R is the ambient heat capacity corresponding to the external laying environment of the target cable at a preset time interval. n The outer sheath thermal resistance of the target cable is given by h, where h is a preset time interval. The cable sheath temperature of the target cable at the first target time point corresponding to the preset time interval. The cable sheath temperature of the target cable at the second target time point corresponding to the preset time interval. The cable sheath temperature of the target cable at the third target time point corresponding to the preset time interval. The ambient temperature of the target cable at the first target time point corresponding to the preset time interval. The ambient temperature of the target cable at the second target time point corresponding to the preset time interval. The temperature of the metal sheath of the target cable at the first target time point corresponding to the preset time interval. The temperature of the metal sheath of the target cable at the second target time point corresponding to the preset time interval is denoted as .

[0107] Optionally, in the above-mentioned device, the current equivalent environmental thermal parameter determination module 250 can be specifically used for:

[0108] According to the preset abnormal data identification rules, abnormal environmental thermal capacity and abnormal environmental thermal resistance are filtered out from the environmental thermal capacity and environmental thermal resistance corresponding to the external laying environment of the target cable at each preset time interval.

[0109] Calculate the average value of the remaining ambient heat capacity, and determine the average value as the current ambient heat capacity corresponding to the external laying environment of the target cable;

[0110] Calculate the average value of the remaining environmental thermal resistance, and determine the average value as the current environmental thermal resistance corresponding to the external laying environment of the target cable.

[0111] Optionally, the above-described device further includes a current cable conductor temperature acquisition module, used to determine the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable based on the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval, and further includes:

[0112] Substitute the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable into the thermal balance equation corresponding to the target cable to obtain the current cable conductor temperature of the target cable.

[0113] Optionally, in the above-mentioned device, the current equivalent environmental thermal parameter providing module 260 can be used for:

[0114] The parameter display page provides the target user with the current equivalent environmental thermal parameters.

[0115] The parameter monitoring device provided in this embodiment of the invention can execute the parameter monitoring method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method execution.

[0116] Example 3

[0117] Figure 3 This is a schematic diagram of the structure of an electronic device provided in Embodiment 3 of the present invention, as shown below. Figure 3 As shown, the device includes a processor 310, a storage device 320, an input device 330, and an output device 340; the number of processors 310 in the device can be one or more. Figure 3 Taking a processor 310 as an example; the processor 310, storage device 320, input device 330 and output device 340 in the device can be connected via a bus or other means. Figure 3 Taking the example of a connection between China and Israel via a bus.

[0118] Storage device 320, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the parameter monitoring method in this embodiment of the invention (e.g., the environmental thermal parameter calculation formula acquisition module 210, the cable sheath temperature and ambient temperature determination module 220, the cable metal sheath temperature determination module 230, the equivalent environmental thermal parameter determination module 240, the current equivalent environmental thermal parameter determination module 250, and the current equivalent environmental thermal parameter provision module 260 in the parameter monitoring device). Processor 310 executes various functional applications and data processing of the device by running the software programs, instructions, and modules stored in storage device 320, thereby implementing the aforementioned parameter monitoring method, which includes:

[0119] Obtain the user-inputted environmental thermal parameter calculation formula that matches the external laying environment of the target cable. The environmental thermal parameter calculation formula is used to calculate the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable.

[0120] The cable sheath temperature and ambient temperature of the target cable collected within a preset time period before the current time are obtained, and the cable sheath temperature and ambient temperature of the target cable at the target time point corresponding to each preset time period are determined according to each preset time period.

[0121] Based on the cable sheath temperature and cable load data of the target cable at the target time points corresponding to each preset time interval within the preset time period, the cable metal sheath temperature of the target cable at the target time points corresponding to each preset time interval within the preset time period is determined.

[0122] Based on the environmental thermal parameter calculation formula, the cable sheath temperature, ambient temperature, and cable metal sheath temperature of the target cable at the target time point corresponding to each preset time interval within the preset duration, the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval are determined.

[0123] Based on the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval, determine the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable.

[0124] The current equivalent environmental thermal parameters are provided to the target user.

[0125] Storage device 320 may primarily include a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a given function; the data storage area may store data created based on terminal usage. Furthermore, storage device 320 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory, or other non-volatile solid-state storage device. In some instances, storage device 320 may further include memory remotely located relative to processor 310, which can be connected to the device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0126] Input device 330 can be used to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the device. Output device 340 may include display devices such as a display screen.

[0127] Example 4

[0128] Embodiment 4 of the present invention also provides a computer-readable storage medium having a computer program stored thereon. When executed by a processor, the program is used to perform a parameter monitoring method, the method comprising:

[0129] Obtain the user-inputted environmental thermal parameter calculation formula that matches the external laying environment of the target cable. The environmental thermal parameter calculation formula is used to calculate the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable.

[0130] The cable sheath temperature and ambient temperature of the target cable collected within a preset time period before the current time are obtained, and the cable sheath temperature and ambient temperature of the target cable at the target time point corresponding to each preset time period are determined according to each preset time period.

[0131] Based on the cable sheath temperature and cable load data of the target cable at the target time points corresponding to each preset time interval within the preset time period, the cable metal sheath temperature of the target cable at the target time points corresponding to each preset time interval within the preset time period is determined.

[0132] Based on the environmental thermal parameter calculation formula, the cable sheath temperature, ambient temperature, and cable metal sheath temperature of the target cable at the target time point corresponding to each preset time interval within the preset duration, the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval are determined.

[0133] Based on the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval, determine the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable.

[0134] The current equivalent environmental thermal parameters are provided to the target user.

[0135] Of course, the computer-readable storage medium provided in the embodiments of the present invention stores a computer program thereon. The program is not limited to the method operation described above, but can also perform related operations in the parameter monitoring method provided in any embodiment of the present invention.

[0136] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0137] It is worth noting that in the embodiments of the above parameter monitoring device, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional unit are only for easy differentiation and are not used to limit the scope of protection of the present invention.

[0138] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A parameter monitoring method, characterized in that, include: Obtain the user-inputted environmental thermal parameter calculation formula that matches the external laying environment of the target cable. The environmental thermal parameter calculation formula is used to calculate the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable. The cable sheath temperature and ambient temperature of the target cable collected within a preset time period before the current time are obtained, and the cable sheath temperature and ambient temperature of the target cable at the target time point corresponding to each preset time period are determined according to each preset time period. The step of determining the cable sheath temperature and ambient temperature of the target cable at target time points corresponding to each preset time interval within the preset duration, based on each preset time interval, includes: Perform the following operations for each preset time interval: According to a preset time interval, within the preset duration, a first target time point, a second target time point, and a third target time point corresponding to the preset time interval are obtained; From the cable sheath temperatures of the target cable collected within the preset time period, the cable sheath temperatures of the target cable at the first target time point, the second target time point, and the third target time point corresponding to the preset time interval are obtained; From the ambient temperatures of the target cable collected within the preset time period, the ambient temperatures of the target cable at the first target time point and the second target time point corresponding to the preset time interval are obtained; Among them, the multiple preset time intervals correspond to different durations. Based on the multiple preset time intervals with different durations, the cable sheath temperature and ambient temperature at different target time points corresponding to the multiple preset time intervals with different durations are determined from the multiple cable sheath temperatures and ambient temperatures obtained. Based on the cable sheath temperature and cable load data of the target cable at target time points corresponding to each preset time interval within the preset duration, the cable metal sheath temperature of the target cable at each preset time interval within the preset duration is determined; wherein, the cable metal sheath temperature is expressed by the expression... Obtain, among which , These represent the temperature of the cable's metallic sheath and the temperature of the cable's outer sheath, respectively; For the thermal resistance of the cable outer sheath, The heat flow rate passing through the thermal resistance of the cable outer sheath; based on the environmental thermal parameter calculation formula, the cable sheath temperature, ambient temperature, and cable metal sheath temperature of the target cable at the target time point corresponding to each preset time interval within the preset time period, the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval are determined. Based on the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval, determine the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable. Provide the current equivalent environmental thermal parameters to the target user; The equivalent environmental thermal parameters include environmental heat capacity and environmental thermal resistance. The step of determining the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval based on the environmental thermal parameter calculation formula, the cable sheath temperature, ambient temperature, and cable metal sheath temperature of the target cable at target time points corresponding to each preset time interval within the preset duration, includes: Perform the following operations for each preset time interval: Calculate the environmental heat capacity and environmental thermal resistance corresponding to the external laying environment of the target cable at a preset time interval using the environmental thermal parameter calculation formula described below: ， ， in, The environmental thermal resistance corresponding to the external laying environment of the target cable at a preset time interval. The ambient heat capacity corresponding to the external laying environment of the target cable at a preset time interval. The outer sheath thermal resistance of the target cable. For the preset time interval, The cable sheath temperature of the target cable at the first target time point corresponding to the preset time interval. The cable sheath temperature of the target cable at the second target time point corresponding to the preset time interval. The cable sheath temperature of the target cable at the third target time point corresponding to the preset time interval. The ambient temperature of the target cable at the first target time point corresponding to the preset time interval. The ambient temperature of the target cable at the second target time point corresponding to the preset time interval. The temperature of the metal sheath of the target cable at the first target time point corresponding to the preset time interval. The temperature of the metal sheath of the target cable at the second target time point corresponding to the preset time interval is denoted as .

2. The method according to claim 1, characterized in that, The step of determining the cable metal sheath temperature of the target cable at each preset time interval within the preset time period, based on the cable sheath temperature and cable load data of the target cable at each preset time interval within the preset time period, includes: Perform the following operations for each preset time interval: Based on the cable sheath temperature and cable load data of the target cable at the first and second target time points corresponding to the preset time interval, the cable metal sheath temperature of the target cable at the first and second target time points corresponding to the preset time interval is calculated.

3. The method according to claim 1, characterized in that, The step of determining the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable based on the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval includes: According to the preset abnormal data identification rules, abnormal environmental thermal capacity and abnormal environmental thermal resistance are filtered out from the environmental thermal capacity and environmental thermal resistance corresponding to the external laying environment of the target cable at each preset time interval. Calculate the average value of the remaining ambient heat capacity, and determine the average value as the current ambient heat capacity corresponding to the external laying environment of the target cable; Calculate the average value of the remaining environmental thermal resistance, and determine the average value as the current environmental thermal resistance corresponding to the external laying environment of the target cable.

4. The method according to claim 1, characterized in that, After determining the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable based on the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval, the method further includes: Substitute the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable into the thermal balance equation corresponding to the target cable to obtain the current cable conductor temperature of the target cable.

5. The method according to claim 1, characterized in that, Providing the current equivalent environmental thermal parameters to the target user includes: The parameter display page provides the target user with the current equivalent environmental thermal parameters.

6. A parameter monitoring device, characterized in that, include: An environmental thermal parameter calculation formula acquisition module is used to acquire an environmental thermal parameter calculation formula input by the user that matches the external laying environment of the target cable. The environmental thermal parameter calculation formula is used to calculate the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable. The cable sheath temperature and ambient temperature determination module is used to acquire the cable sheath temperature and ambient temperature of the target cable collected within a preset time period prior to the current time, and to determine the cable sheath temperature and ambient temperature of the target cable at target time points corresponding to each preset time period within the preset time period, based on each preset time interval. Specifically, the cable sheath temperature and ambient temperature determination module is used to perform the following operations for each preset time interval: acquire, based on the preset time interval, a first target time point, a second target time point, and a third target time point corresponding to the preset time interval within the preset time period; and acquire the cable sheath temperature and ambient temperature of the target cable collected within the preset time period... The cable sheath temperature of the target cable is obtained from the cable sheath temperature at a first target time point, a second target time point, and a third target time point corresponding to the preset time interval; the ambient temperature of the target cable at the first target time point and the second target time point corresponding to the preset time interval is obtained from the ambient temperature of the target cable collected within the preset time period; wherein, the preset time interval can be multiple different preset time intervals, and the cable sheath temperature and ambient temperature at different target time points corresponding to multiple different preset time intervals are determined from the multiple cable sheath temperatures and ambient temperatures obtained according to the multiple different preset time intervals; The cable metal sheath temperature determination module is used to determine the cable metal sheath temperature of the target cable at each preset time point within the preset time period, based on the cable sheath temperature and cable load data at each preset time point within the preset time period; wherein, the cable metal sheath temperature is expressed by an expression. Obtain, among which , These represent the temperature of the cable's metallic sheath and the temperature of the cable's outer sheath, respectively; For the thermal resistance of the cable outer sheath, The heat flow rate passing through the thermal resistance of the cable's outer sheath; The equivalent environmental thermal parameter determination module is used to determine the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval based on the environmental thermal parameter calculation formula, the cable sheath temperature, ambient temperature, and cable metal sheath temperature of the target cable at the target time point corresponding to each preset time interval within the preset time period. The current equivalent environmental thermal parameter determination module is used to determine the current equivalent environmental thermal parameters corresponding to the external laying environment of the target cable based on the equivalent environmental thermal parameters corresponding to the external laying environment of the target cable at each preset time interval. The current equivalent environmental thermal parameter providing module is used to provide the current equivalent environmental thermal parameters to the target user; The equivalent environmental thermal parameter determination module is used to perform the following operations for each preset time interval: Calculate the environmental heat capacity and environmental thermal resistance corresponding to the external laying environment of the target cable at a preset time interval using the environmental thermal parameter calculation formula described below: ， ， in, The environmental thermal resistance corresponding to the external laying environment of the target cable at a preset time interval. The ambient heat capacity corresponding to the external laying environment of the target cable at a preset time interval. The outer sheath thermal resistance of the target cable. For the preset time interval, The cable sheath temperature of the target cable at the first target time point corresponding to the preset time interval. The cable sheath temperature of the target cable at the second target time point corresponding to the preset time interval. The cable sheath temperature of the target cable at the third target time point corresponding to the preset time interval. The ambient temperature of the target cable at the first target time point corresponding to the preset time interval. The ambient temperature of the target cable at the second target time point corresponding to the preset time interval. The temperature of the metal sheath of the target cable at the first target time point corresponding to the preset time interval. The temperature of the metal sheath of the target cable at the second target time point corresponding to the preset time interval is denoted as .

7. An electronic device, characterized in that, The electronic device includes: One or more processors; Storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the parameter monitoring method as described in any one of claims 1-5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the parameter monitoring method as described in any one of claims 1-5.

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