An edge computing device and method for dynamic capacity increase of transmission lines

Abstract

The present invention discloses an edge computing device and method for dynamic capacity increase of transmission lines. The edge computing device includes: an edge terminal, which includes a collection module, a storage module, a calculation and analysis module, and a communication module; the collection module is used to obtain the ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the current of the transmission line according to the instructions sent by the calculation and analysis module; the storage module is used to locally store the data obtained by the collection module; the calculation and analysis module is used to calculate the hidden capacity of the transmission line according to the data obtained by the collection module, and is also used to output the data stored in the storage module or the data calculated by the calculation and analysis module according to external instructions. The technical solution of the present invention can quickly analyze the transmission line data locally, reduce the data transmission volume to the monitoring center, and ensure the timeliness of the line capacity increase by the monitoring center.

Description

Technical Field

[0001] The present invention belongs to the technical field of on-line monitoring of transmission lines, and particularly relates to an edge computing device and method for dynamic capacity increase of transmission lines. Background Art

[0002] Building an efficient and environmentally friendly power system mainly based on new energy, tapping the transmission potential of the power grid, and ensuring the stable operation of transmission lines are important links in supporting the "dual-carbon goal"; in order to better cope with the current substantial growth in power demand, it is necessary to transform the existing transmission lines or add new transmission lines. Due to practical problems such as investment construction time, funds, and land acquisition, it is difficult to solve the problems of transmission line transformation and addition in the short term; it can be considered to use the existing transmission lines, carry out dynamic capacity increase transformation on them, improve the current-carrying capacity, and solve the power shortage problem that appears in the short term.

[0003] At present, when facing the surging power consumption demand, it is necessary to calculate the potential transmission capacity of the transmission line; although the current edge devices have improved in data acquisition accuracy, they still generate a large amount of data, making their acquisition and processing cause huge pressure on the background data calculation; therefore, due to the complicated data during background calculation, it cannot effectively support the high real-time demand, and cannot timely and effectively give scientific line capacity increase suggestions to the staff. Summary of the Invention

[0004] The purpose of the present invention is to provide an edge computing device and method for dynamic capacity increase of transmission lines to solve one or more of the above-mentioned technical problems. The technical solution provided by the present invention can quickly analyze the transmission line data locally, reduce the data transmission volume to the monitoring center, ensure the timeliness of the monitoring center for line capacity increase, and can greatly reduce the phenomenon of power grid power rationing.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] An edge computing device for dynamic capacity increase of transmission lines provided by the present invention includes: an edge terminal; the edge terminal includes a collection module, a storage module, a calculation and analysis module, and a communication module; wherein,

[0007] The collection module is used to obtain the ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the current of the transmission line according to the instruction sent by the calculation and analysis module;

[0008] The storage module is used to locally store the ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the current of the transmission line obtained by the collection module;

[0009] The calculation and analysis module is used to calculate the hidden capacity of the transmission line according to the ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the current of the transmission line acquired by the acquisition module; the calculation and analysis module is further used to obtain an external instruction and output the data stored in the storage module or the data calculated by the calculation and analysis module according to the external instruction;

[0010] The communication module is used to realize the communication between the edge terminal and the outside.

[0011] A further improvement of the present invention lies in that in the calculation and analysis module, the steps of calculating the hidden capacity of the transmission line according to the ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the current of the transmission line acquired by the acquisition module include:

[0012] (1) Calculate and obtain the maximum allowable current-carrying capacity of the transmission line, and the calculation expression is,

[0013] In the formula, I amp is the maximum allowable current-carrying capacity of the transmission line, Q r is the radiation heat dissipation power of the transmission conductor, Q c is the convective heat dissipation power of the transmission conductor, Q s is the solar heat absorption power per unit length of the overhead conductor, R(T c ) is the resistance corresponding to the transmission conductor temperature of T c ;

[0014] In the formula, ∈ is the emissivity of the object, A is the surface area of the object, σ is the Stefan-Boltzmann constant, T c is the conductor temperature of the transmission line; t1 is the ambient temperature around the transmission line;

[0015] Q c =0.57θλ f Re 0.485 ; In the formula, λ f is the heat transfer coefficient of the air layer on the conductor surface, λ f =2.42*10 -2 +7*(t1+0.5 θ )*10 -5 , θ is the average temperature rise on the surface of the transmission line;

[0016] Re = VD / v; In the formula, Re is the Reynolds number, V is the ambient wind speed around the transmission line measured by the wind speed sensor, D is the outer diameter of the transmission line; v = 1.32*10 -5 +9.6*(t1+0.5 θ )*10-8 ;

[0017] Q s = αJD; where α is the heat absorption coefficient of the transmission line, J is the sunlight intensity on the transmission line, and D is the outer diameter of the transmission line;

[0018] (2) Based on the maximum allowable current-carrying capacity of the transmission line obtained in step (1), calculate the hidden capacity ΔP of the transmission line. The calculation expression is,

[0019] ΔP = P m -P;

[0020] where P m is the maximum transmission capacity of the transmission line, and P is the current transmission capacity of the transmission line;

[0021] where U is the voltage; K is a parameter related to the line, it is an AC three-phase transmission line when, and K = 1 for a DC transmission line; is the transmission power factor.

[0022] A further improvement of the present invention is that the acquisition module includes a temperature sensor, a wind speed and direction sensor, a current sensor, and an analog-to-digital converter; wherein,

[0023] the temperature sensor is used to obtain the analog signals of the ambient temperature around the transmission line and the conductor temperature of the transmission line, the wind speed and direction sensor is used to obtain the analog signal of the ambient wind speed around the transmission line, and the current sensor is used to obtain the analog signal of the current of the transmission line; the analog-to-digital converter is used to obtain the analog signals obtained by each sensor and convert them into digital signals for output.

[0024] A further improvement of the present invention is that between each sensor and the analog-to-digital converter is wirelessly transmitted through "LoRa".

[0025] A further improvement of the present invention is that it further includes:

[0026] a local energy storage power supply module for supplying power to the edge terminal.

[0027] A further improvement of the present invention is that the local energy storage power supply module uses a solar panel or a battery.

[0028] A further improvement of the present invention is that the communication module communicates with the outside through a 5G network or Beidou communication.

[0029] A further improvement of the present invention is that in the calculation and analysis module, the steps of obtaining an external instruction and outputting the data stored in the storage module or the data calculated by the calculation and analysis module according to the external instruction include:

[0030] After receiving "View line operation status", output the data stored in the storage module;

[0031] After receiving "View line capacity increase assessment", output the data calculated by the calculation and analysis module.

[0032] An edge computing method for transmission line dynamic capacity increase provided by the present invention includes the following steps:

[0033] Obtain the ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the transmission line current, and store them locally;

[0034] Calculate the hidden capacity of the transmission line based on the obtained ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the transmission line current;

[0035] Obtain an external instruction, and output the locally stored data or the calculated hidden capacity of the transmission line according to the external instruction.

[0036] A further improvement of the present invention lies in that the step of calculating the hidden capacity of the transmission line based on the obtained ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the transmission line current includes:

[0037] (1) Calculate and obtain the maximum allowable current-carrying capacity of the transmission line, and the calculation expression is,

[0038] In the formula, I amp is the maximum allowable current-carrying capacity of the transmission line, Q r is the radiation heat dissipation power of the transmission conductor, Q c is the convective heat dissipation power of the transmission conductor, Q s is the solar radiation heat absorption power per unit length of the overhead conductor, R(T c ) is the resistance corresponding to the transmission conductor temperature of T c at that time;

[0039] In the formula, ∈ is the emissivity of the object, A is the surface area of the object, σ is the Stefan-Boltzmann constant, T c is the conductor temperature of the transmission line; t1 is the ambient temperature around the transmission line;

[0040] Q c = 0.57θλ f Re 0.485 ; In the formula, λ f is the heat transfer coefficient of the air layer on the conductor surface, λ f = 2.42*10-2 +7*(t1 + 0.5 θ ) * 10 -5 , where θ is the average temperature rise on the surface of the transmission line;

[0041] Re = VD / v; where Re is the Reynolds number, V is the ambient wind speed around the transmission line measured by a wind speed sensor, D is the outer diameter of the transmission line; v = 1.32 * 10 -5 +9.6*(t1 + 0.5 θ ) * 10 -8 ;

[0042] Q s = αJD; where α is the heat absorption coefficient of the transmission line, J is the solar radiation intensity of sunlight on the transmission line, D is the outer diameter of the transmission line;

[0043] (2) Based on the maximum allowable current-carrying capacity of the transmission line obtained in step (1), calculate the hidden capacity ΔP of the transmission line. The calculation expression is,

[0044] ΔP = P m -P;

[0045] where P m is the maximum transmission capacity of the transmission line, and P is the current transmission capacity of the transmission line;

[0046] where U is the voltage; K is a parameter related to the line, it is an AC three-phase transmission line when, K = 1 for a DC transmission line; is the transmission power factor.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] In the technical solution provided by the present invention, the real-time parameters of the operation of the transmission line are collected by the acquisition module, the operation state of the transmission line is analyzed by the calculation and analysis module, and the dynamic capacity increase result of the line is calculated and evaluated. The evaluation result or the collected data is directly sent to the monitoring center to guide the reasonable capacity increase of the transmission line, thereby greatly reducing the data transmission volume. Further explanatory, for the "power cut due to power demand surge" problem, in the technical solution of the present invention, edge computing is adopted to improve the current-carrying capacity technology of the transmission line. This means has the characteristics of fast local data analysis of the transmission line, small amount of transmitted data, and fast calculation of the monitoring center, and can solve the technical problem of poor real-time performance of the dynamic capacity increase of the transmission line existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art; obviously, the accompanying drawings in the following description are some embodiments of the present invention, and for those of ordinary skill in the art, other accompanying drawings can be obtained based on these drawings without creative efforts.

[0050] Figure 1 It is a schematic structural diagram of an edge computing device for dynamic capacity increase of a transmission line provided by an embodiment of the present invention;

[0051] Figure 2 It is a schematic diagram of the installation positions of each sensor and the edge terminal in an embodiment of the present invention;

[0052] Figure 3 It is a schematic diagram of the working process of the edge computing device for dynamic capacity increase in an embodiment of the present invention;

[0053] Figure 4 It is a schematic diagram of the processing process of the calculation and analysis module in an embodiment of the present invention;

[0054] In the figure, 1. Temperature sensor; 2. Wind speed and direction sensor; 3. Current sensor; 4. Edge terminal; 4-1. Acquisition module; 4-2. Storage module; 4-3. Calculation and analysis module; 4-4. Communication module; 5. Local energy storage power supply module; 6. Monitoring center. Specific embodiments

[0055] In order to enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0056] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above accompanying drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0057] The present invention will be further described in detail below with reference to the accompanying drawings:

[0058] Please refer to Figure 1 , an edge computing device for dynamic capacity increase of a transmission line provided by an embodiment of the present invention includes: an edge terminal 4;

[0059] The edge terminal 4 includes a collection module 4-1, a storage module 4-2, a calculation and analysis module 4-3, and a communication module 4-4 that are connected in sequence; among them,

[0060] The collection module 4-1 is used to obtain the ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the current of the transmission line according to the instruction sent by the calculation and analysis module 4-3;

[0061] The storage module 4-2 is used to store the ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the current of the transmission line collected by the collection module 4-1;

[0062] The calculation and analysis module 4-3 is used to calculate the hidden capacity of the transmission line according to the ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the current of the transmission line collected by the collection module 4-1; it is used to obtain an external instruction and output the data stored in the storage module 4-2 or the data calculated by the calculation and analysis module 4-3 according to the external instruction;

[0063] The communication module 4-4 is used to realize the communication between the edge terminal 4 and the external monitoring center 6.

[0064] Please refer to Figure 3 and Figure 4 , in an embodiment of the present invention, the calculation and analysis module 4-3 calculates according to the collected data received in real time, and the calculation expression is,

[0065] Q r +Q c =Q s +I 2 R(T c );

[0066] In the formula, Q c is the convective heat dissipation power of the transmission conductor, W / m; Q r is the radiative heat dissipation power of the transmission conductor, W / m; Q s is the solar heat absorption power per unit length of the overhead conductor, W / m; I is the current of the conductor, A; R(T c ) is the temperature of the transmission conductor is T cThe corresponding resistance, Ω / m, is a function related to the wire temperature;

[0067]

[0068] Q s = αJD;

[0069] In the formula, I amp is the maximum allowable current-carrying capacity of the transmission line, α is the heat absorption coefficient of the transmission line, 0.23 - 0.46 for new lines and 0.90 - 0.95 for old lines; J is the solar radiation intensity on the transmission line, taking 1 kW / m 2 , and D is the outer diameter of the transmission line, m.

[0070]

[0071] In the formula, ∈ is the emissivity of the object, A is the surface area of the object, σ is the Stefan-Boltzmann constant, with a value of 5.67×10 -8 W / (m 2 ·K 4 ), T c is the wire temperature of the transmission line; t1 is the ambient temperature around the transmission line.

[0072] Q c = 0.57θλ f Re 0.485 ;

[0073] In the formula, λ f is the heat transfer coefficient of the air layer on the wire surface, λ f = 2.42*10 -2 +7*(t1 + 0.5 θ )*10 -5 , t1 is the ambient temperature around the transmission line, and θ is the average temperature rise on the surface of the transmission line.

[0074] Re = VD / v;

[0075] In the formula, Re is the Reynolds number, V is the ambient wind speed around the transmission line measured by a wind speed sensor, D is the outer diameter of the transmission line; v = 1.32*10 -5 +9.6*(t1 + 0.5 θ )*10 -8 .

[0076] Finally, according to From ΔP = P m -P, the hidden capacity of the transmission line can be obtained, that is, the transmission capacity that can be expanded for the current line; among them, U is the voltage; K is the parameter related to the line, it is an AC three-phase transmission line when, and K = 1 for a DC transmission line; is the transmission power factor, P m is the maximum transmission capacity of the transmission line, and P is the current transmission capacity of the transmission line.

[0077] Please refer to Figure 1 and Figure 2 In the embodiments of the present invention, the acquisition module 4-1 may include a temperature sensor 1, a wind speed and direction sensor 2, a current sensor 3, and an analog-to-digital converter; wherein, the temperature sensor 1 is used to obtain the analog signals of the ambient temperature around the transmission line and the conductor temperature of the transmission line; the wind speed and direction sensor 2 is used to obtain the analog signal of the ambient wind speed around the transmission line; the current sensor 3 is used to obtain the analog signal of the current flowing through the transmission line; the analog-to-digital converter is used to obtain the analog signals obtained by each sensor and convert them into digital signals for output. Further specifically, one temperature sensor 1 and one current sensor 3 are respectively installed on the A, B, and C transmission conductors on the transmission tower side, which are respectively used to obtain the analog signal of the conductor temperature of the transmission line and the analog signal of the current flowing through the transmission line; one temperature sensor 1 is installed on the top of the transmission tower to obtain the ambient temperature around the transmission line; one wind speed and direction sensor 2 is installed on the cross arm of the transmission tower to obtain the analog signal of the ambient wind speed around the transmission line; each sensor is wirelessly transmitted to the analog-to-digital conversion device through "LoRa".

[0078] The embodiments of the present invention specifically provide an edge computing device that can monitor and efficiently monitor the dynamic capacity increase of transmission lines in real time. It collects the real-time parameters of the operation of the transmission line through temperature sensors, current sensors, and wind speed and direction sensors, analyzes the operation state of the transmission line through the edge computing device, calculates and evaluates the dynamic capacity increase result of the line, and directly sends the evaluation result to the monitoring center to guide the reasonable capacity increase of the transmission line, thereby greatly reducing the data transmission volume; at the same time, it can also implement the traditional data transmission mode, analyze the collected original data and directly send it to the monitoring center for unified calculation and evaluation in the monitoring center. Compared with the traditional data transmission mode, the present invention can perform edge computing and evaluation on the monitoring data of the transmission line, obtain the maximum allowable current-carrying capacity and hidden capacity of the line, so as to greatly reduce the data transmission volume. When the power demand on the user side increases, the evaluation result can be quickly sent to the monitoring center, greatly reducing the data transmission volume and data transmission time, providing a basis for the reasonable capacity increase of the transmission line, and ensuring the safe operation of the transmission line and the power demand of users.

[0079] Please refer to Figure 1 In the embodiments of the present invention, the edge computing device for the dynamic capacity increase of the transmission line further includes:

[0080] The in-situ energy storage power supply module 5 can use solar panels or batteries to supply power to one or more of the acquisition module 4-1, the storage module 4-2, the calculation and analysis module 4-3, and the communication module 4-4.

[0081] In the embodiment of the present invention, the edge terminal 4 can be connected to the monitoring center 6 through a 5G network or Beidou communication; a server is installed in the monitoring center 6, and intelligent analysis software for transmission line is arranged.

[0082] In the embodiment of the present invention, there are two functions for external communication. One is to pack and send the collected data to the monitoring center 6 without calculation, and the other is to calculate based on the collected data and output the calculation result, which can be sent to the monitoring center 6 for reference.

[0083] Specifically, if the monitoring center 6 does not issue an instruction of "view the line operation status", the calculation and analysis module 4-3 sends acquisition commands to 8 sensors every 6 hours for 20 minutes continuously; if the monitoring center 6 issues an instruction of "view the operation status", the calculation and analysis module 4-3 immediately sends acquisition commands to 8 sensors for 5 minutes continuously. If the monitoring center 6 issues an instruction of "view the line capacity increase assessment", the calculation and analysis module 4-3 immediately sends acquisition commands to 8 sensors for 10 minutes continuously;

[0084] After receiving "view the line operation status", the acquisition module 4-1 converts the collected analog signal into a digital signal. The data goes to the calculation and analysis module 4-3 after passing through the storage module 4-2, and then the collected data is sent to the monitoring center 6 through 5G or Beidou communication. After receiving "view the line capacity increase assessment", the acquisition module 4-1 converts the collected analog signal into a digital signal, and the calculation and analysis module 4-3 performs arithmetic analysis on the collected data to obtain the in-situ capacity increase assessment of the line, and then sends the assessment result to the monitoring center 6.

[0085] In the embodiment of the present invention, it may further include:

[0086] The monitoring center 6 analyzes the data sent by the calculation and analysis module 4-3 under the instruction of "view the line operation status" to obtain the transmission line status parameters, and analyzes the capacity increase ability of the transmission line according to the status parameters. The monitoring center 6 receives the assessment result sent by the calculation and analysis module 4-3 under the instruction of "view the line capacity increase assessment", and obtains the capacity increase ability of the transmission line according to the assessment result.

[0087] In summary, the embodiments of the present invention disclose an edge computing device for dynamic capacity increase, including a temperature sensor, a wind speed and direction sensor, a current sensor, a collection module, a storage module, a calculation and analysis module, a communication module, an in-situ energy storage and power supply module, a monitoring center, etc. The edge terminal can send the line capacity increase evaluation data after calculation and analysis to the monitoring center, greatly reducing the amount of data sent, and can also directly package and send the collected data to the monitoring center. The edge computing device for dynamic capacity increase of the present invention conducts online monitoring of the transmission line, enabling the line management staff to timely understand the current operating conditions of the conductor, providing corresponding data references and auxiliary decision-making suggestions for power dispatching, and ensuring the safe operation of the conductor to the greatest extent.

[0088] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0089] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of flows and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0090] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0091] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide for implementing the process inFigure 1 one process or multiple processes and / or boxes Figure 1 steps of the functions specified in one box or multiple boxes.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific implementation manners of the present invention, and any modification or equivalent replacement without departing from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. An edge computing device for dynamic capacity increase of transmission lines, characterized in that, Including: An edge terminal (4); the edge terminal (4) includes a collection module (4-1), a storage module (4-2), a calculation and analysis module (4-3), and a communication module (4-4); where The collection module (4-1) is used to obtain the ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the current of the transmission line according to the instruction sent by the calculation and analysis module (4-3); The storage module (4-2) is used to locally store the ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the current of the transmission line obtained by the collection module (4-1); The calculation and analysis module (4-3) is used to calculate the hidden capacity of the transmission line based on the ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the current of the transmission line obtained by the collection module (4-1); the calculation and analysis module (4-3) is also used to obtain an external instruction and output the data stored in the storage module (4-2) or the data calculated by the calculation and analysis module (4-3) according to the external instruction; The communication module (4-4) is used to realize the communication between the edge terminal (4) and the outside; Among them, in the calculation and analysis module (4-3), the steps of calculating the hidden capacity of the transmission line based on the ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the current of the transmission line obtained by the collection module (4-1) include: (1) Calculate and obtain the maximum allowable current-carrying capacity of the transmission line, and the calculation formula is In the formula, I amp is the maximum allowable current-carrying capacity of the transmission line, Q r is the radiation heat dissipation power of the transmission conductor, Q c is the convective heat dissipation power of the transmission conductor, Q s is the solar radiation heat absorption power per unit length of the overhead conductor, R(T c ) is the resistance corresponding to the temperature T of the transmission conductor c ; where ∈ is the emissivity of the object, A is the surface area of the object, σ is the Stefan-Boltzmann constant, and T c is the conductor temperature of the transmission line; t1 is the ambient temperature around the transmission line; Q c = 0.57θλ f Re 0.485 ; where λ f is the heat transfer coefficient of the air layer on the wire surface, λ f = 2.42 * 10 -2 + 7 * (t1 + 0.5 θ ) * 10 -5 , θ is the average temperature rise on the transmission line surface; Re = VD / v; where Re is the Reynolds number, V is the ambient wind speed around the transmission line measured by a wind speed sensor, D is the outer diameter of the transmission line; v = 1.32*10 -5 + 9.6*(t1 + 0.5 θ )*10 -8 ; Q s = αJD; where α is the heat absorption coefficient of the transmission line, J is the sunlight intensity on the transmission line, and D is the outer diameter of the transmission line; (2) Based on the maximum allowable current-carrying capacity of the transmission line obtained in step (1), calculate and obtain the hidden capacity ΔP of the transmission line, and the calculation formula is ΔP = P m - P; Wherein, P m is the maximum transmission capacity of the transmission line, and P is the current transmission capacity of the transmission line; Wherein, U is the voltage; K is a parameter related to the line, when it is an AC three-phase transmission line, K = 1 when it is a DC transmission line; is the transmission power factor.

2. The edge computing device for dynamic capacity increase of transmission lines according to claim 1, wherein The collection module (4-1) includes a temperature sensor (1), a wind speed and direction sensor (2), a current sensor (3), and an analog-to-digital converter; where The temperature sensor (1) is used to obtain the analog signals of the ambient temperature around the transmission line and the conductor temperature of the transmission line, the wind speed and direction sensor (2) is used to obtain the analog signal of the ambient wind speed around the transmission line, and the current sensor (3) is used to obtain the analog signal of the current of the transmission line; the analog-to-digital converter is used to obtain the analog signals obtained by each sensor and convert them into digital signals for output.

3. The edge computing device for dynamic capacity increase of transmission lines according to claim 2, characterized in that, Each sensor is wirelessly transmitted with the analog-to-digital converter through "LoRa".

4. The edge computing device for dynamic capacity increase of a power transmission line according to claim 1, characterized in that Also included: A local energy storage and power supply module (5) for supplying power to the edge terminal (4).

5. The edge computing device for dynamic capacity increase of transmission lines according to claim 4, wherein The local energy storage and power supply module (5) uses a solar panel or a battery.

6. The edge computing device for dynamic capacity increase of a transmission line according to claim 1, wherein, The communication module (4-4) uses a 5G network or Beidou communication to communicate with the outside.

7. The edge computing device for dynamic capacity increase of a power transmission line according to claim 1, characterized in that, In the calculation and analysis module (4-3), the steps of obtaining an external instruction and outputting the data stored in the storage module (4-2) or the data calculated by the calculation and analysis module (4-3) according to the external instruction include: After receiving "View line operation status", output the data stored in the storage module (4-2); After receiving "View Line Capacity Increase Assessment", output the data obtained by the calculation and analysis module (4-3).

8. An edge computing method for dynamic capacity increase of transmission lines, characterized in that, It includes the following steps: Obtain the ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the current of the transmission line, and store them locally; Calculate the hidden capacity of the transmission line based on the obtained ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the current of the transmission line; Obtain an external instruction, and output the locally stored data or the hidden capacity of the transmission line calculated according to the external instruction; Among them, the step of calculating the hidden capacity of the transmission line based on the obtained ambient temperature around the transmission line, the conductor temperature of the transmission line, the ambient wind speed around the transmission line, and the current of the transmission line includes: (1) Calculate and obtain the maximum allowable current-carrying capacity of the transmission line, and the calculation expression is In the formula, I amp is the maximum allowable current-carrying capacity of the transmission line, Q r is the radiation heat dissipation power of the transmission conductor, Q c is the convective heat dissipation power of the transmission conductor, Q s is the solar radiation heat absorption power per unit length of the overhead conductor, R(T c ) is the resistance corresponding to the temperature T of the transmission conductor c ; where ∈ is the emissivity of the object, A is the surface area of the object, σ is the Stefan-Boltzmann constant, and T c is the conductor temperature of the transmission line; t1 is the ambient temperature around the transmission line; Q c = 0.57θλ f Re 0.485 ; where, λ f is the heat transfer coefficient of the air layer on the conductor surface, λ f = 2.42*10 -2 + 7*(t1 + 0.5 θ )*10 -5 , θ is the average temperature rise on the surface of the transmission line; Re = VD / v; where Re is the Reynolds coefficient, V is the ambient wind speed around the transmission line measured by a wind speed sensor, D is the outer diameter of the transmission line; v = 1.32*10 -5 + 9.6*(t1 + 0.5 θ )*10 -8 ; Q s = αJD; where α is the heat absorption coefficient of the transmission line, J is the solar radiation intensity of sunlight on the transmission line, and D is the outer diameter of the transmission line; (2) Based on the maximum allowable current-carrying capacity of the transmission line obtained in step (1), calculate and obtain the hidden capacity ΔP of the transmission line, and the calculation expression is ΔP = P m - P; where P m is the maximum transmission capacity of the transmission line, and P is the current transmission capacity of the transmission line; Wherein, U is the voltage; K is a parameter related to the line, it is an AC three-phase transmission line when [condition not specified in the original]; it is a DC transmission line when K = 1; and [parameter not clearly defined in the original] is the transmission power factor.

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