A coating-conductor-steel core composite structure type power transmission conductor ampacity simulation evaluation system

Abstract

The application provides a coating-conductor-steel core composite structure type power transmission conductor carrying capacity simulation evaluation system, and belongs to the field of wire simulation evaluation, and solves the problems that the coated wire cannot be efficiently simulated in the environment, and a carrying capacity simulation model cannot be established. The system comprises a wind speed simulation subsystem, a tension detection subsystem, a fixed experiment cabin and a mobile experiment cabin. The mobile experiment cabin is provided with a main control operation computer on the outside, and is provided with a sunshine simulation subsystem and a visual monitoring subsystem on the inside. The mobile experiment cabin and the fixed experiment cabin are provided with a cable temperature measurement subsystem and a temperature simulation subsystem inside. The fixed experiment cabin is provided with a precipitation simulation subsystem, a coating coating subsystem and eight cable clamping subsystems. The main control operation computer is provided with a cable data subsystem, a simulation simulation subsystem, a carrying capacity calculation evaluation subsystem and an early warning subsystem inside. The application can simulate the environment, analyze the simulation, and establish a carrying capacity calculation simulation evaluation model of the wire coated with the coating.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power transmission line simulation evaluation, and relates to a power transmission conductor ampacity simulation evaluation system, in particular to a coating-conductor-steel core composite structure type power transmission conductor ampacity simulation evaluation system. BACKGROUND

[0002] High-voltage power transmission technology is an important part of modern power systems. It reduces energy loss during power transmission by increasing the voltage level of power transmission, thereby improving power transmission efficiency. With the continuous growth of power demand and the increasing scale of power grids, high-voltage power transmission technology has been widely used. In the field of high-voltage power transmission, direct current transmission and alternating current transmission are two main transmission methods, each with different characteristics and advantages.

[0003] In order to improve the performance of high-voltage power transmission conductors, a "coating-conductor-steel core" composite structure type four-split high-voltage power transmission conductor has been designed. As an innovative form of high-voltage power transmission technology, it further improves the efficiency and stability of power transmission by optimizing the conductor structure and arrangement.

[0004] However, the existing power transmission conductors generally use a two-layer material structure of steel core aluminum strand, and there are existing power transmission conductor ampacity calculation simulation evaluation models for this structure. However, this model is not completely suitable for the ampacity calculation of power transmission conductors coated with a coating. Some parameters in the model, such as the conductor surface radiation coefficient and heat absorption coefficient, are related to the degree of newness and surface contamination of the conductor, and the empirical values are not accurate enough.

[0005] The cross-section of the "coating-conductor-steel core" composite structure power transmission conductor is modeled in detail, and the geometric structure and material properties of the composite structure power transmission conductor are accurately described. During the operation of the conductor, the heat conduction and heat dissipation characteristics of the coating together determine the temperature field distribution of the conductor, thereby affecting the ampacity of the conductor. Therefore, the core of the power transmission conductor ampacity calculation simulation evaluation model based on the "coating-conductor-steel core" structure is to establish a new ampacity simulation evaluation model based on the physical properties of different coating materials after coating, and to derive the ampacity simulation calculation formula after coating.

[0006] Based on this, we propose a coating-conductor-steel core composite structure type power transmission conductor ampacity simulation evaluation system, which can simulate the environment, accurately simulate and analyze, derive the ampacity simulation calculation formula after coating, and establish a power transmission conductor ampacity calculation simulation evaluation model based on the coating-conductor-steel core composite structure. SUMMARY

[0007] The purpose of the present application is to solve the above-mentioned problems existing in the prior art, and provide a coating-conductor-steel core composite structure type power transmission conductor ampacity simulation evaluation system.

[0008] The purpose of the present application can be achieved by the following technical solutions:

[0009] The coating-conductor-steel core composite structure type power transmission conductor ampacity simulation evaluation system comprises a wind speed simulation subsystem, a tension detection subsystem, a fixed experiment cabin and a mobile experiment cabin opposite to the fixed experiment cabin, a main control operation computer is arranged on the outer side of the mobile experiment cabin, a sunlight simulation subsystem and a visual monitoring subsystem are arranged on the inner side of the mobile experiment cabin, a cable temperature measurement subsystem and a temperature simulation subsystem are arranged in the interiors of the mobile experiment cabin and the fixed experiment cabin, a precipitation simulation subsystem, a coating coating subsystem and eight cable clamping subsystems are arranged on the fixed experiment cabin, the precipitation simulation subsystem, the cable clamping subsystem and the coating coating subsystem are sequentially arranged from top to bottom, the temperature simulation subsystem is arranged on the side of the cable clamping subsystem, and a cable data subsystem, a simulation simulation subsystem, an ampacity calculation and evaluation subsystem and a warning subsystem are arranged in the main control operation computer.

[0010] The working principle of the present application is as follows: the mobile experiment cabin is opened, the four-split high-voltage power transmission conductor to be evaluated is clamped on the eight cable clamping subsystems, the tension detection subsystem detects the pulling of the four-split high-voltage power transmission conductor and records the tension at this time, the mobile experiment cabin is closed, the simulation simulation subsystem controls the wind speed simulation subsystem to simulate the environmental wind speed, controls the sunlight simulation subsystem to simulate the sunlight intensity and sunlight direction, controls the temperature simulation subsystem to simulate the environmental temperature, and controls the precipitation simulation subsystem to simulate the environmental humidity; the cable temperature measurement subsystem monitors the temperature of the four-split high-voltage power transmission conductor in real time; the experimental cable outer diameter and the experimental cable new and old degree are input through the main control operation computer, the cable data subsystem is used to collect various performance data parameters, and the ampacity calculation and evaluation subsystem monitors and evaluates the ampacity of the high-voltage power transmission conductor without coating at this time in real time.

[0011] The coating material and the coating thickness are input through the main control operation computer, the simulation simulation subsystem controls the coating coating subsystem to coat the four-split high-voltage power transmission conductor and controls the spraying thickness, and the coating is dried through the cooperation of the temperature simulation subsystem, the wind speed simulation subsystem and the sunlight simulation subsystem.

[0012] After drying, the tension detection subsystem detects and records the tension of the four-split high-voltage transmission line at this time; then the simulation subsystem controls the wind speed simulation subsystem to simulate the environmental wind speed, controls the sunlight simulation subsystem to simulate the sunlight intensity and sunlight direction, controls the temperature simulation subsystem to simulate the environmental temperature, and controls the precipitation simulation subsystem to simulate the environmental humidity;

[0013] The simulation subsystem controls the wind speed simulation subsystem to simulate the environmental wind speed, controls the sunlight simulation subsystem to simulate the sunlight intensity and sunlight direction, controls the temperature simulation subsystem to simulate the environmental temperature, and controls the precipitation simulation subsystem to simulate the environmental humidity; the cable temperature measurement subsystem monitors the temperature of the four-split high-voltage transmission line in real time, the cable data subsystem is used to collect various performance data parameters, and the current-carrying capacity calculation and evaluation subsystem monitors and evaluates the current-carrying capacity of the high-voltage transmission line after coating in real time;

[0014] Then the main control operation computer is used to input the coating thickness, the coating is thickened, the simulation subsystem controls the coating subsystem to coat the four-split high-voltage transmission line and controls the spraying thickness, and the coating is dried through the cooperation of the temperature simulation subsystem, the wind speed simulation subsystem, and the sunlight simulation subsystem;

[0015] The tension detection subsystem detects and records the tension of the four-split high-voltage transmission line at this time; the cable temperature measurement subsystem monitors the temperature of the four-split high-voltage transmission line in real time, the cable data subsystem is used to collect various performance data parameters, and the current-carrying capacity calculation and evaluation subsystem monitors and evaluates the current-carrying capacity of the high-voltage transmission line after coating in real time;

[0016] The above experiment is repeated to obtain the relationship between the current-carrying capacity and the coating thickness;

[0017] Finally, the moving experiment cabin is opened, the evaluated four-split high-voltage transmission line is taken off from the eight cable clamping subsystems, the same four-split high-voltage transmission line to be evaluated is placed, the coating material is changed, the above experiment is repeated, and the relationship between the current-carrying capacity and the coating material is obtained;

[0018] Then the four-split high-voltage transmission experiment cable of different materials is replaced, the outer diameter of the experiment cable and the new and old degree of the experiment cable are recorded, and the above experiment is repeated to obtain the relationship between the current-carrying capacity of the four-split high-voltage transmission experiment cable and the coating thickness and the coating material;

[0019] The visual monitoring subsystem monitors the internal situation of the fixed experiment cabin and the moving experiment cabin in real time;

[0020] The early warning subsystem automatically issues a pre-warning or alarm information when the current-carrying capacity of the high-voltage transmission line exceeds a preset threshold value, and provides timely maintenance suggestions.

[0021] The mobile experimental cabin comprises a mobile cabin wall and a U-shaped mobile cabin frame, a plurality of exhaust valves are arranged on the mobile cabin wall, an electric scissor type adjusting frame and a flexible cover are arranged between the mobile cabin wall and the mobile cabin frame, the electric scissor type adjusting frame is located outside the flexible cover, mobile wheels are arranged at the lower ends of the mobile cabin frame and the electric scissor type adjusting frame, a sealing protrusion is arranged outside the mobile cabin frame, and two sealing telescopic rods are symmetrically arranged between the mobile cabin frame and the mobile cabin wall.

[0022] With the above structure, the electric scissor type adjusting frame is expanded to drive the mobile cabin frame to move, and then drive the flexible cover to expand, the sealing telescopic rods and the sealing protrusion cooperate with the fixed experimental cabin to form a sealed space, and the load flow simulation evaluation experiment is carried out, the mobile wheels are used for moving the electric scissor type adjusting frame and the mobile cabin frame, and the exhaust valves are used for controlling exhaust (heat discharge).

[0023] The switch button is used for controlling the start and stop of the device, the button display screen displays a simple and clear system interface, is easy to operate and use, facilitates the operation and maintenance personnel to quickly start and obtain the required information, the flashing alarm lamp is used for alarm flashing, the main control computer facilitates the operation and maintenance personnel to quickly start and obtain the required information, the cable data subsystem, the simulation subsystem, the load flow calculation and evaluation subsystem and the early warning subsystem are arranged in the interior of the main control computer.

[0024] The fixed experimental cabin comprises a fixed cabin wall, a sealing groove matched with the sealing protrusion in shape and specification is arranged on the inner side of the fixed cabin wall, a plurality of sealing cylinders penetrating through the fixed cabin wall are arranged on the fixed cabin wall, a water receiving bottom box is arranged at the lower end of the inner side of the fixed cabin wall, a drain pipe is arranged on the water receiving bottom box and penetrates through the fixed cabin wall, the two sealing telescopic rods are clamped on the two sides of the water receiving bottom box, two symmetrically arranged clamping supports are fixed on the inner side of the fixed cabin wall, and every four cable clamping subsystems are arranged on one clamping support, and eight cable clamping subsystems are symmetrically arranged in pairs.

[0025] With the above structure, the sealing groove matched with the sealing protrusion in shape and specification, the two sealing telescopic rods clamped on the two sides of the water receiving bottom box, the sealing, the formation of a sealed space, the load flow simulation evaluation experiment, a plurality of sealing cylinders for sealing the electric wire and the pipeline, the water receiving bottom box for water receiving, the drainage through the drain pipe, every four cable clamping subsystems arranged on one clamping support, and eight cable clamping subsystems symmetrically arranged in pairs, for clamping and electrifying four split high-voltage transmission conductors.

[0026] The sunlight simulation subsystem includes a plurality of explosion-proof temperature control lamps and a plurality of light sensors, the explosion-proof temperature control lamps are respectively fixed on the inner side of the mobile cabin frame and the inner side of the mobile cabin wall, and the light sensors are fixed on the inner side of the mobile cabin frame and the inner side of the fixed cabin wall; the visual monitoring subsystem includes a plurality of visual cameras, the visual cameras are respectively fixed on the inner side of the mobile cabin frame and the inner side of the mobile cabin wall; and the cable temperature measurement subsystem includes a plurality of optical fiber temperature sensors, the optical fiber temperature sensors are respectively fixed on the inner side of the mobile cabin wall and the upper end of the water receiving bottom box.

[0027] With the above structure, the explosion-proof temperature control lamps at different positions are controlled to be turned on to simulate the sunlight intensity and the sunlight direction, the light sensors detect the light intensity for effective feedback, the visual cameras are used for real-time monitoring of the internal conditions of the fixed experiment cabin and the mobile experiment cabin, and the optical fiber temperature sensors are used for real-time monitoring of the temperature of the experiment cables and transmitting the temperature data to the cable data subsystem.

[0028] The temperature simulation subsystem includes a cold air assembly, a hot air assembly, a ventilation box and a plurality of temperature sensors, the cold air assembly and the hot air assembly are located on the outer side of the fixed cabin wall, the ventilation box is fixed on the inner side of the fixed cabin wall, and the temperature sensors are arranged in the mobile experiment cabin and the fixed experiment cabin; the cold air assembly includes a refrigeration box, a cold air fan is fixed on the outer side of the refrigeration box, and an air outlet is fixed on the inner side of the refrigeration box; the air outlet is connected with one side of the ventilation box through a pipeline, the pipeline between the air outlet and the ventilation box passes through a sealing cylinder at a corresponding position, the hot air assembly includes a hot air box, a hot air fan is fixed on the outer side of the hot air box, and an air outlet of the hot air box is connected with the other side of the ventilation box through a pipeline, the pipeline between the air outlet of the hot air box and the ventilation box passes through a sealing cylinder at a corresponding position, and the wind speed simulation subsystem is composed of the cold air fan, the hot air fan, the ventilation box and a plurality of wind speed sensors, and the wind speed sensors are fixed on the inner side of the mobile cabin frame.

[0029] With the above structure, the cold air fan blows cold air after passing through the refrigeration box, the cold air enters one side of the ventilation box through the air outlet, and blows on the four split high-voltage transmission conductors clamped by the eight cable clamping subsystems to simulate environmental cold wind; the hot air fan blows hot air after passing through the hot air box, the hot air enters the other side of the ventilation box, and blows on the four split high-voltage transmission conductors clamped by the eight cable clamping subsystems to simulate environmental hot wind; the cold air fan, the hot air fan and the ventilation box cooperate to simulate the environmental wind speed, and the wind speed sensor monitors the environmental wind speed in real time.

[0030] The precipitation simulation subsystem includes a water injection tank assembly located outside the fixed cabin wall, a precipitation simulation mechanism arranged above the ventilation tank, and a plurality of humidity sensors. The water injection tank assembly includes a water pump and a water tank, and the water inlet end of the water pump is connected to the water tank through a pipeline. The precipitation simulation mechanism includes a main water pipe, and the water outlet end of the water pump is connected to the main water pipe through a pipeline. The pipeline between the water outlet end of the water pump and the main water pipe passes through a sealing cylinder at a corresponding position. The lower end of the main water pipe is fixed with a plurality of supports, and the supports are fixed above the ventilation tank. The side of the main water pipe is provided with a plurality of drain pipes, and the lower end of each drain pipe is provided with a plurality of precipitation nozzles. The humidity sensors are fixed inside the fixed experiment cabin and the mobile experiment cabin.

[0031] With the above structure, the water pump pumps clean water in the water tank into the main water pipe, and then drains through a plurality of drain pipes, and sprays through the precipitation nozzles onto the four split high-voltage transmission cables clamped by the eight cable clamping subsystems for evaluation, to simulate the environmental humidity and simulate the rainfall. The humidity sensors are used to detect the environmental humidity.

[0032] The coating coating subsystem includes a coating feeding mechanism located outside the fixed cabin wall and a coating coating mechanism arranged at the upper end of the water collecting bottom box. The coating feeding mechanism includes an electromagnetic flow valve, a discharge pump, an electric control box, and a heating box. The upper end of the heating box is fixed with a coating material tank. The inside of the coating material tank is provided with a curved heat removal pipe. The upper end of the heat removal pipe extends above the coating material tank. The lower end of the heat removal pipe extends to the side of the coating material tank. The lower end of the heat removal pipe is provided with an exhaust fan connected thereto. The air inlet end of the exhaust fan is connected to the heating box. The discharge end of the discharge pump is connected to the coating material tank through a pipeline. The discharge end of the discharge pump is connected to the electromagnetic flow valve through a pipeline. The electric control box is connected to the electromagnetic flow valve, the discharge pump, the heating box, and the exhaust fan through wires, and the main control operation computer.

[0033] The coating coating mechanism includes a guide rail seat and a drag chain plate. The guide rail seat and the drag chain plate are fixed at the upper end of the water collecting bottom box. The side of the guide rail seat is fixed with a rack. A sliding seat is slidably arranged on the guide rail seat. A cable drag chain is arranged between the sliding seat and the drag chain plate. A mobile motor and an electric screw rod are fixed on the sliding seat. A mobile gear is fixed on the output shaft of the mobile motor. The mobile gear is engaged with the rack. A mechanical arm is arranged on the electric screw rod in transmission. An electric arc-shaped clamping rod is arranged at the end of the mechanical arm. Two coating nozzles are arranged on the clamping rod of the electric arc-shaped clamping rod. The coating nozzles are connected to the discharge end of the electromagnetic flow valve through a pipeline. The pipeline between the coating nozzles and the discharge end of the electromagnetic flow valve passes through a sealing cylinder at a corresponding position. The cable drag chain is connected to the electric screw rod, the mechanical arm, the electric arc-shaped clamping rod, and the mobile motor, and the electric control box through wires.

[0034] With the above structure, the coating material is placed in the coating material tank, the heating box heats the coating material tank, so that the coating material can be stably transported, the exhaust fan extracts the heat in the heating box, and the heat is discharged through the curved heat exhaust pipe, the curved heat exhaust pipe keeps the coating material in the coating material tank warm, and the discharge pump injects the coating material into the electromagnetic flow valve, and the coating material is injected into the corresponding coating nozzle through the electromagnetic flow valve.

[0035] The cable drag chain is used for wiring, the output shaft of the moving motor drives the moving gear, the moving gear engages with the rack to drive the sliding seat to slide on the guide rail seat, thereby driving the coating nozzle to move, the electric screw rod drives the mechanical arm to move longitudinally, and the mechanical arm drives the electric arc-shaped clamping rod to adjust the angle, so that the clamping rod of the electric arc-shaped clamping rod is wrapped on both sides of the four-split high-voltage transmission conductor, and the coating nozzle is opposite to the four-split high-voltage transmission conductor, and the four-split high-voltage transmission conductor is coated.

[0036] The cable clamping mechanism comprises a wiring seat and an electric push rod, the wiring seat and the electric push rod are fixed on the clamping support at the corresponding position, the wiring seat is provided with a wiring cylinder, the outer side of the wiring cylinder is provided with a clamping ring groove, the rear side of the wiring seat is fixed with a support frame, a connecting rod is slidably arranged on the support frame, a hinge connecting rod is hingedly connected between one end of the connecting rod and the wiring seat, the other end of the connecting rod is provided with a locking ring plate which is opposite to the wiring seat, a conductive cable is arranged between the locking ring plate and the connecting rod, one end of the conductive cable extends into the wiring seat and the conductive cable is electrically connected with the wiring cylinder, the other end of the conductive cable passes through a sealing cylinder at the corresponding position, and the other end of the conductive cable is electrically connected with the main control operation computer; the extension end of the electric push rod is fixed with a tension sensor, the tension sensor is fixed with a base, the base is provided with a clamping assembly and a through hole mounting plate, the through hole mounting plate is provided with a buckling assembly, the clamping assembly and the buckling assembly are collinear with the axis of the wiring cylinder, and the tension detection subsystem is composed of the electric push rod, the tension sensor, the base and the clamping assembly.

[0037] With the above structure, the other end of the conductive cable is electrically connected with the master control computer for detecting voltage level, current size and other experimental cable state information parameters, the two ends of the four-split high-voltage transmission conductor pass through the clamping assembly, the through-hole mounting plate and the buckling assembly in the corresponding positions in turn, the clamping assembly clamps the end of the four-split high-voltage transmission conductor, the telescopic end of the electric push rod is retracted, the tension sensor is pulled, the base is moved by the tension sensor, thereby the clamping assembly, the through-hole mounting plate and the buckling assembly are pulled, the bare wire at the end of the four-split high-voltage transmission conductor is inserted into the inside of the terminal cylinder and is electrically connected with the terminal cylinder, so that the conductive cable is electrically connected with the four-split high-voltage transmission conductor for monitoring the experimental cable state information parameters, the buckling assembly is buckled and locked in the clamping ring groove, and the electric push rod, the tension sensor, the base and the clamping assembly cooperate to detect and record the tension of the four-split high-voltage transmission conductor before and after the coating layer is coated when the four-split high-voltage transmission conductor is pulled; when the four-split high-voltage transmission conductor is removed, the buckling assembly is rotated to release the buckling and locking of the clamping assembly on the clamping ring groove, the telescopic end of the electric push rod is elongated, that is, the clamping assembly, the through-hole mounting plate and the buckling assembly are pushed out, so that the bare wire at the end of the four-split high-voltage transmission conductor is pulled out of the inside of the terminal cylinder and is disconnected with the terminal cylinder.

[0038] The clamping assembly comprises a fixed plate, a lifting push rod fixed on the fixed plate, a linkage cross bar fixed at the telescopic end of the lifting push rod, hinged connecting rods hinged at both ends of the linkage cross bar, the hinged connecting rods being hinged to the fixed plate, arc clamping plates hinged at the ends of the hinged connecting rods, and an insulating anti-skid layer arranged on the inner side of the arc clamping plates; the buckling assembly comprises a fixed cylinder fixed on the through-hole mounting plate, a plurality of position adjusting grooves arranged in the circumferences of the fixed cylinder, a rotating cylinder rotatably arranged in the inside of the fixed cylinder, a plurality of vertical rod seats fixed on the rotating cylinder, buckling claws hinged to the vertical rod seats, and adjusting screws screwed at the ends of the buckling claws, the adjusting screws corresponding in position and number to the position adjusting grooves.

[0039] With the above structure, the telescopic end of the lifting push rod retracts the linkage cross bar, pulls the two hinged connecting rods to rotate around the fixed plate, the ends of the two hinged connecting rods are synchronously unfolded, thereby driving the arc clamping plates to be synchronously unfolded, the four-split high-voltage transmission conductor is placed between the arc clamping plates, the telescopic end of the lifting push rod elongates the linkage cross bar, pulls the two hinged connecting rods to rotate around the fixed plate, the ends of the two hinged connecting rods are synchronously folded, thereby driving the arc clamping plates to be synchronously folded, so that the insulating anti-skid layer is clamped on the four-split high-voltage transmission conductor;

[0040] The rotating cylinder is manually rotated, the rotating cylinder drives the plurality of circumferentially distributed vertical rod seats to rotate, thereby driving the clamping claws to rotate synchronously, the screwing depth of the adjusting screw rod is adjusted, the end of the adjusting screw rod is abutted on the fixed cylinder, and the clamping claws are clamped in the clamping ring groove; when the clamping is released, the rotating cylinder is manually rotated, the end of the adjusting screw rod is slid into the corresponding position of the adjusting slot, and the end of the clamping claw can be unfolded, and the clamping claw is released from the clamping in the clamping ring groove.

[0041] The cable data subsystem is used to collect parameters including but not limited to environmental temperature, environmental humidity, environmental wind speed, sunshine intensity, sunshine direction, experimental cable temperature, experimental cable outer diameter, experimental cable newness, experimental cable stress, coating material and coating thickness;

[0042] The simulation subsystem adopts simulation technology and algorithm to simulate the operating environment parameters and coating parameters of the high-voltage transmission line under various working conditions, including but not limited to environmental temperature, environmental humidity and environmental wind speed external factors and the influence of coating material and coating thickness, and the load capacity and performance of the conductor are predicted through accurate modeling and simulation analysis of the physical properties and operating state of the conductor.

[0043] The load capacity calculation and evaluation subsystem monitors and evaluates the load capacity of the high-voltage transmission conductor in real time, establishes a load capacity calculation and simulation evaluation model of the transmission conductor based on the coating-conductor-steel core composite structure, adopts the same simulation operating environment parameters and experimental cable basic parameters, takes the coating parameters as variables, performs load capacity simulation evaluation on the relationship between the coating parameters and the load capacity and the experimental cable temperature, analyzes the influencing factors of the load capacity of the coating-conductor-steel core composite transmission line, obtains the load capacity simulation calculation formula after coating, provides accurate evaluation results and early warning information, and helps operation and maintenance personnel to find and handle potential problems in time.

[0044] The simulation operating environment parameters include environmental temperature, environmental humidity, environmental wind speed, sunshine intensity and sunshine direction, etc.

[0045] The experimental cable basic parameters include experimental cable outer diameter, experimental cable newness, experimental cable unit length resistance, experimental cable stress, voltage grade, current size, etc.

[0046] The coating parameters include coating material and coating thickness, etc.

[0047] The control variable method is adopted: by keeping several parameters unchanged and only changing one variable, the influence of the variable on the result or phenomenon is observed and analyzed.

[0048] The following is the relationship between the coating parameters and the current-carrying capacity (and the temperature of the experimental cable) of the current-carrying capacity simulation evaluation under the condition that the simulation running environment parameters and the experimental cable basic parameters are kept the same.

[0049] The early warning subsystem automatically issues a warning or alarm information when the current-carrying capacity of the high-voltage transmission conductor exceeds the preset threshold, reminding the operation and maintenance personnel to take timely measures for processing, and providing timely maintenance suggestions to ensure the safe and stable operation of the power system.

[0050] Compared with the prior art, the coating-conductor-steel core composite structure type transmission conductor current-carrying capacity simulation evaluation system has the following advantages:

[0051] The simulation running environment is simulated by cooperating the mobile experimental cabin and the fixed experimental cabin;

[0052] Through the cooperation of the eight cable clamping subsystems, the four split high-voltage transmission conductors are stably clamped and the voltage and current are controlled for power simulation, and the tension detection subsystem detects and records the tension of the four split high-voltage transmission conductors before and after being coated with the coating;

[0053] The sunlight simulation subsystem simulates the sunlight intensity and the sunlight azimuth, the temperature simulation subsystem simulates the environmental temperature, the control precipitation simulation subsystem simulates the environmental humidity, and the wind speed simulation subsystem simulates the environmental wind speed to simulate the actual running environment;

[0054] The visual monitoring subsystem is used for real-time monitoring of the internal conditions of the fixed experimental cabin and the mobile experimental cabin; the cable temperature monitoring subsystem is used for real-time monitoring of the temperature of the four split high-voltage transmission conductors;

[0055] The cable data subsystem is used for collecting various performance data parameters, the simulation simulation subsystem uses simulation technology and algorithm to simulate the running environment parameters and coating parameters of the high-voltage transmission line under various working conditions, accurately models and simulates the physical properties and running state of the conductor, and predicts the current-carrying capacity and performance of the conductor; the current-carrying capacity calculation and evaluation subsystem real-time monitors and evaluates the current-carrying capacity of the high-voltage transmission conductor coated with the coating, adopts the control variable method: by keeping several parameters unchanged and only changing one variable, the influence of the variable on the result or phenomenon is observed and analyzed, that is, the relationship between the coating parameters and the current-carrying capacity (and the temperature of the experimental cable) of the current-carrying capacity simulation evaluation under the condition that the simulation running environment parameters and the experimental cable basic parameters are kept the same; the early warning subsystem automatically issues a warning or alarm information when the current-carrying capacity of the high-voltage transmission conductor exceeds the preset threshold, and provides timely maintenance suggestions. BRIEF DESCRIPTION OF DRAWINGS

[0056] Figure 1 is a structural schematic view of the present application when closed.

[0057] Figure 2 is a structural schematic diagram of the invention when unfolded.

[0058] Figure 3 is a structural schematic diagram of the mobile experiment cabin in the invention.

[0059] Figure 4 is a structural schematic diagram of the fixed experiment cabin in the invention.

[0060] Figure 5 is a right side structural schematic diagram of the cable clamping mechanism in the invention.

[0061] Figure 6 is a left side structural schematic diagram of the cable clamping mechanism in the invention.

[0062] Figure 7 is a partial component structural schematic diagram of the cable clamping mechanism in the invention.

[0063] Figure 8 is a structural schematic diagram of the coating application mechanism in the invention.

[0064] Figure 9 is a structural schematic diagram of the coating application mechanism in the invention. Figure 8 is an enlarged structural schematic diagram of A in the invention.

[0065] Figure 10 is a structural schematic diagram of the water injection tank assembly and precipitation simulation mechanism in the invention.

[0066] Figure 11 is a structural schematic diagram of the coating feeding mechanism in the invention.

[0067] Figure 12 is a system block diagram of the invention.

[0068] Figure 13 is a comparative experiment table of coating material one in the invention.

[0069] Figure 14 is a comparative experiment table of coating material two in the invention.

[0070] In the figure, 1, mobile experiment cabin; 2, main control operation computer component; 3, fixed experiment cabin; 4, cold air assembly; 5, coating feeding mechanism; 6, water injection tank assembly; 7, hot air assembly; 8, explosion-proof temperature control lamp; 9, sealing protrusion; 10, visual camera; 11, optical fiber temperature sensor; 12, mobile wheel; 13, electric scissor type adjusting frame; 14, flexible cover; 15, mobile cabin frame; 16, fixed cabin wall; 17, sealing groove; 18, ventilation box; 19, sealing cylinder; 20, clamping support; 21, cable clamping mechanism; 22, coating coating mechanism; 23, precipitation simulation mechanism; 24, water receiving bottom box; 25, wiring cylinder; 26, clamping ring groove; 27, wiring seat; 28, hinged connecting rod; 29, connecting rod; 30, support frame; 31, locking ring plate; 32, electric push rod; 33, tension sensor; 34, base; 35, clamping assembly; 36, through hole mounting plate; 37, buckling assembly; 38, buckling claw; 39, adjusting screw; 40, vertical rod seat; 41, adjusting groove; 42, rotating cylinder; 43, fixed cylinder; 44, fixed plate; 45, lifting push rod; 46, locking screw; 47, linkage cross bar; 48, hinged connecting rod; 49, circular arc clamping plate; 50, insulating anti-skid layer; 51, cable drag chain; 52, guide rail seat; 53, rack; 54, sliding seat; 55, electric screw; 56, mechanical arm; 57, electric arc-shaped clamping rod; 58, coating spray head; 59, moving motor; 60, water pump; 61, water tank; 62, main water pipe; 63, support; 64, drain pipe; 65, precipitation spray head; 66, electromagnetic flow valve; 67, discharge pump; 68, coating material tank; 69, heat removal pipe; 70, electric control box; 71, heating box; 72, exhaust fan; 73, switch button; 74, button display screen; 75, flashing warning light; 76, main control computer; 77, cold air fan; 78, refrigeration box; 79, air outlet cylinder; 80, hot air tank; 81, hot air fan. DETAILED DESCRIPTION

[0071] The following are specific embodiments of the present application and further describe the technical solutions of the present application in conjunction with the drawings, but the present application is not limited to these embodiments.

[0072] As Figures 1-12The illustrated coating-conductor-steel core composite structure type power transmission conductor carrying capacity simulation evaluation system includes a wind speed simulation subsystem, a tension detection subsystem, a fixed experiment cabin 3, and a mobile experiment cabin 1 opposite the fixed experiment cabin 3. The outer side of the mobile experiment cabin 1 is provided with a main control operation computer 2, and the inner side of the mobile experiment cabin 1 is provided with a sunlight simulation subsystem and a visual monitoring subsystem. The inside of the mobile experiment cabin 1 and the fixed experiment cabin 3 is provided with a cable temperature measurement subsystem and a temperature simulation subsystem. The fixed experiment cabin 3 is provided with a precipitation simulation subsystem, a coating coating subsystem, and eight cable clamping subsystems. The precipitation simulation subsystem, the cable clamping subsystem, and the coating coating subsystem are sequentially arranged from top to bottom. The temperature simulation subsystem is located at the side of the cable clamping subsystem. The inside of the main control operation computer 2 is provided with a cable data subsystem, a simulation simulation subsystem, a carrying capacity calculation and evaluation subsystem, and a warning subsystem.

[0073] The mobile experiment cabin 1 is opened, the four-split high-voltage power transmission conductor to be evaluated is clamped on the eight cable clamping subsystems, the tension detection subsystem detects the pulling of the four-split high-voltage power transmission conductor, and the tension at this time is recorded. The mobile experiment cabin 1 is closed, the simulation simulation subsystem controls the wind speed simulation subsystem to simulate the environmental wind speed, controls the sunlight simulation subsystem to simulate the sunlight intensity and sunlight direction, controls the temperature simulation subsystem to simulate the environmental temperature, and controls the precipitation simulation subsystem to simulate the environmental humidity. The cable temperature measurement subsystem monitors the temperature of the four-split high-voltage power transmission conductor at this time in real time. The experimental cable outer diameter and the experimental cable new and old degree are input through the main control operation computer 2. The cable data subsystem is used to collect various performance data parameters, and the carrying capacity calculation and evaluation subsystem monitors and evaluates the carrying capacity of the high-voltage power transmission conductor without coating at this time in real time.

[0074] The coating material and the coating thickness are input through the main control operation computer 2. The simulation simulation subsystem controls the coating coating subsystem to coat the four-split high-voltage power transmission conductor and controls the spraying thickness. The coating is dried through the cooperation of the temperature simulation subsystem, the wind speed simulation subsystem, and the sunlight simulation subsystem.

[0075] After drying, the tension detection subsystem detects and records the tension of the four-split high-voltage power transmission conductor at this time. Then, the simulation simulation subsystem controls the wind speed simulation subsystem to simulate the environmental wind speed, controls the sunlight simulation subsystem to simulate the sunlight intensity and sunlight direction, controls the temperature simulation subsystem to simulate the environmental temperature, and controls the precipitation simulation subsystem to simulate the environmental humidity.

[0076] The simulation subsystem controls the wind speed simulation subsystem to simulate the environmental wind speed, controls the sunlight simulation subsystem to simulate the sunlight intensity and sunlight direction, controls the temperature simulation subsystem to simulate the environmental temperature, and controls the precipitation simulation subsystem to simulate the environmental humidity; the cable temperature measurement subsystem is used to monitor the temperature of the high-voltage transmission cable in real time, the cable data subsystem is used to collect various performance data parameters, and the current-carrying capacity calculation and evaluation subsystem is used to monitor and evaluate the current-carrying capacity of the high-voltage transmission cable after coating;

[0077] The main control operation computer 2 is used to input the coating thickness, the coating thickness is increased, the simulation subsystem controls the coating subsystem to coat the high-voltage transmission cable, and the coating thickness is controlled by the temperature simulation subsystem, the wind speed simulation subsystem, and the sunlight simulation subsystem, and the coating is dried;

[0078] The tension detection subsystem is used to detect and record the tension of the high-voltage transmission cable, the cable temperature measurement subsystem is used to monitor the temperature of the high-voltage transmission cable in real time, the cable data subsystem is used to collect various performance data parameters, and the current-carrying capacity calculation and evaluation subsystem is used to monitor and evaluate the current-carrying capacity of the high-voltage transmission cable after coating;

[0079] The above experiment is repeated to obtain the relationship between the current-carrying capacity and the coating thickness;

[0080] Finally, the mobile experiment cabin 1 is opened, the evaluated high-voltage transmission cable is taken off from the eight cable clamping subsystems, the same high-voltage transmission cable to be evaluated is placed, the coating material is changed, and the above experiment is repeated to obtain the relationship between the current-carrying capacity and the coating material;

[0081] The high-voltage transmission experimental cable of different materials is replaced, the outer diameter of the experimental cable and the new and old degree of the experimental cable are recorded, and the above experiment is repeated to obtain the relationship between the current-carrying capacity of the high-voltage transmission experimental cable and the coating thickness and the coating material;

[0082] The visual monitoring subsystem is used to monitor the internal situation of the fixed experiment cabin 3 and the mobile experiment cabin 1 in real time;

[0083] The early warning subsystem automatically sends early warning or alarm information when the current-carrying capacity of the high-voltage transmission cable exceeds the preset threshold value, and provides timely maintenance suggestions.

[0084] The mobile experiment cabin 1 comprises a mobile cabin wall and a U-shaped mobile cabin frame 15, the mobile cabin wall is provided with a plurality of exhaust valves, the mobile cabin wall and the mobile cabin frame 15 are provided with an electric scissor type adjusting frame 13 and a flexible cover 14, the electric scissor type adjusting frame 13 is located outside the flexible cover 14, the lower ends of the mobile cabin frame 15 and the electric scissor type adjusting frame 13 are provided with mobile wheels 12, the outside of the mobile cabin frame 15 is provided with a sealing protrusion 9, and the mobile cabin frame 15 and the mobile cabin wall are provided with two symmetrically arranged sealing telescopic rods; the main control operation computer part 2 comprises a main control operation box and a main control computer 76, the main control operation box and the main control computer 76 are fixed outside the mobile cabin wall, the main control operation box is provided with a switch button 73, a button display screen 74 and a flashing warning light 75, and the main control computer 76 is electrically connected with the button display screen 74.

[0085] The electric scissor type adjusting frame 13 is unfolded, drives the mobile cabin frame 15 to move, and then drives the flexible cover 14 to unfold, the sealing telescopic rods and the sealing protrusion 9 cooperate with the fixed experiment cabin 3 to form a sealed space, and the load flow simulation evaluation experiment is carried out, and the mobile wheels 12 are used for moving the electric scissor type adjusting frame 13 and the mobile cabin frame 15, and the exhaust valve is used for controlling exhaust (heat discharge amount);

[0086] The switch button 73 is used for controlling the start and stop of the device, the button display screen 74 displays a simple and clear system interface, is easy to operate and use, facilitates operation and maintenance personnel to quickly get started and obtain required information, the flashing warning light 75 is used for alarm flashing, the main control computer 76 facilitates operation and maintenance personnel to quickly get started and obtain required information, a cable data subsystem, a simulation subsystem, a load flow calculation and evaluation subsystem and a warning subsystem are arranged inside the main control computer 76.

[0087] The fixed experiment cabin 3 comprises a fixed cabin wall 16, the inner side of the fixed cabin wall 16 is provided with a sealing groove 17 matched with the sealing protrusion 9 in shape and specification, the fixed cabin wall 16 is provided with a plurality of sealing barrels 19 penetrating through the fixed cabin wall 16, the inner side of the fixed cabin wall 16 is provided with a water receiving bottom box 24 at the lower end, the water receiving bottom box 24 is provided with a drain pipe, the drain pipe penetrates through the fixed cabin wall 16, the two sealing telescopic rods are clamped on the two sides of the water receiving bottom box 24, and the inner side of the fixed cabin wall 16 is fixed with two symmetrically arranged clamping supports 20, every four cable clamping subsystems are arranged on one clamping support 20, and eight cable clamping subsystems are symmetrically arranged in pairs.

[0088] The sealing groove 17 matched with the sealing protrusion 9 in shape and specification, the two sealing telescopic rods are clamped on the two sides of the water receiving bottom box 24, and the sealing is carried out to form a sealed space, and the load flow simulation evaluation experiment is carried out, the plurality of sealing barrels 19 are used for sealing electric wires and pipelines, the water receiving bottom box 24 is used for water receiving, and water is drained through the drain pipe, every four cable clamping subsystems are arranged on one clamping support 20, and eight cable clamping subsystems are symmetrically arranged in pairs, and are used for clamping and electrifying four split high-voltage transmission conductors.

[0089] The sunlight simulation subsystem comprises a plurality of explosion-proof temperature control lamps 8 and a plurality of light sensors, the explosion-proof temperature control lamps 8 are respectively fixed on the inner side of the mobile cabin frame 15 and the inner side of the mobile cabin wall, and the light sensors are fixed on the inner side of the mobile cabin frame 15 and the inner side of the fixed cabin wall 16; the visual monitoring subsystem comprises a plurality of visual cameras 10, the visual cameras 10 are respectively fixed on the inner side of the mobile cabin frame 15 and the inner side of the mobile cabin wall; the cable temperature measurement subsystem comprises a plurality of optical fiber temperature sensors 11, the optical fiber temperature sensors 11 are respectively fixed on the inner side of the mobile cabin wall and the upper end of the water receiving bottom box 24.

[0090] The explosion-proof temperature control lamps 8 at different positions are controlled to be turned on, a plurality of explosion-proof temperature control lamps 8 cooperate to simulate the sunlight intensity and the sunlight direction, the light sensors detect the light intensity and perform effective feedback, a plurality of visual cameras 10 cooperate to monitor the internal conditions of the fixed experiment cabin 3 and the mobile experiment cabin 1 in real time, and a plurality of optical fiber temperature sensors 11 are used to monitor the temperature of the experiment cables in real time and transmit the temperature data to the cable data subsystem.

[0091] The temperature simulation subsystem comprises a cold air assembly 4, a hot air assembly 7, a ventilation box 18 and a plurality of temperature sensors, the cold air assembly 4 and the hot air assembly 7 are located on the outer side of the fixed cabin wall 16, the ventilation box 18 is fixed on the inner side of the fixed cabin wall 16, and the temperature sensors are arranged in the interiors of the mobile experiment cabin 1 and the fixed experiment cabin 3; the cold air assembly 4 comprises a refrigeration box 78, a cold air fan 77 is fixed on the outer side of the refrigeration box 78, an air outlet pipe 79 is fixed on the inner side of the refrigeration box 78, the air outlet pipe 79 is connected with one side of the ventilation box 18 through a pipeline, the pipeline between the air outlet pipe 79 and the ventilation box 18 passes through a sealing pipe 19 at a corresponding position, the hot air assembly 7 comprises a hot air box 80, a hot air fan 81 is fixed on the outer side of the hot air box 80, and an air outlet of the hot air box 80 is connected with the other side of the ventilation box 18 through a pipeline, the pipeline between the air outlet of the hot air box 80 and the ventilation box 18 passes through the sealing pipe 19 at a corresponding position, and the wind speed simulation subsystem is composed of the cold air fan 77, the hot air fan 81, the ventilation box 18 and a plurality of wind speed sensors, and the wind speed sensors are fixed on the inner side of the mobile cabin frame 15.

[0092] The cold air fan 77 blows cold air after passing through the refrigeration box 78, the cold air enters one side of the ventilation box 18 through the air outlet pipe 79, and blows on the four-split high-voltage transmission conductors clamped by the eight cable clamping subsystems through the ventilation box 18 to simulate environmental cold wind; the hot air fan 81 blows hot air after passing through the hot air box 80, the hot air enters the other side of the ventilation box 18, and blows on the four-split high-voltage transmission conductors clamped by the eight cable clamping subsystems through the ventilation box 18 to simulate environmental hot wind, the cold air fan 77, the hot air fan 81 and the ventilation box 18 cooperate to simulate the environmental wind speed, and the wind speed sensors monitor the environmental wind speed in real time.

[0093] The precipitation simulation subsystem includes a water injection tank assembly 6 located outside the fixed cabin wall 16 and a precipitation simulation mechanism 23 arranged above the ventilation tank 18, and a plurality of humidity sensors. The water injection tank assembly 6 includes a water pump 60 and a water tank 61, and the water inlet end of the water pump 60 is connected to the water tank 61 through a pipeline. The precipitation simulation mechanism 23 includes a main water pipe 62, and the water outlet end of the water pump 60 is connected to the main water pipe 62 through a pipeline. The pipeline between the water outlet end of the water pump 60 and the main water pipe 62 passes through the sealing barrel 19 at the corresponding position. The lower end of the main water pipe 62 is fixed with a plurality of supports 63, and the supports 63 are fixed above the ventilation tank 18. The side of the main water pipe 62 is provided with a plurality of drain pipes 64, and the lower end of the drain pipe 64 is provided with a plurality of precipitation nozzles 65. The humidity sensors are fixed inside the fixed experiment cabin 3 and the mobile experiment cabin 1.

[0094] The water pump 60 pumps out the clean water in the water tank 61 and injects it into the main water pipe 62, and then drains it through the plurality of drain pipes 64, and sprays it through the precipitation nozzles 65 onto the four split high-voltage transmission conductors clamped by the eight cable clamping subsystems for simulation of environmental humidity and rainfall. The humidity sensors are used to detect the environmental humidity.

[0095] The coating coating subsystem includes a coating feeding mechanism 5 located outside the fixed cabin wall 16 and a coating coating mechanism 22 arranged at the upper end of the water collecting bottom box 24. The coating feeding mechanism 5 includes an electromagnetic flow valve 66, a discharge pump 67, an electric control box 70, and a heating box 71. The upper end of the heating box 71 is fixed with a coating material tank 68. The inside of the coating material tank 68 is provided with a curved heat removal pipe 69. The upper end of the heat removal pipe 69 extends out of the coating material tank 68. The lower end of the heat removal pipe 69 extends out of the side of the coating material tank 68. The lower end of the heat removal pipe 69 is provided with an exhaust fan 72 connected thereto. The air inlet end of the exhaust fan 72 is connected to the heating box 71. The discharge pump 67 is connected to the coating material tank 68 through a pipeline. The discharge end of the discharge pump 67 is connected to the electromagnetic flow valve 66 through a pipeline. The electric control box 70 is connected to the electromagnetic flow valve 66, the discharge pump 67, the heating box 71, and the exhaust fan 72 through wires, and is connected to the main control operation computer 2.

[0096] The coating coating mechanism 22 includes a guide rail seat 52 and a drag chain plate, the guide rail seat 52 and the drag chain plate are fixed at the upper end of the water collecting bottom box 24, the side of the guide rail seat 52 is fixed with a rack 53, a sliding seat 54 is slidably arranged on the guide rail seat 52, a cable drag chain 51 is arranged between the sliding seat 54 and the drag chain plate, a moving motor 59 and an electric screw rod 55 are fixed on the sliding seat 54, a moving gear is fixed on the output shaft of the moving motor 59, the moving gear is engaged with the rack 53, a mechanical arm 56 is driven on the electric screw rod 55, an electric arc-shaped clamping rod 57 is arranged at the end of the mechanical arm 56, two coating nozzles 58 are arranged on the clamping rod of the electric arc-shaped clamping rod 57, the coating nozzles 58 and the discharge end of the electromagnetic flow valve 66 are connected by a pipeline, the pipeline between the coating nozzles 58 and the discharge end of the electromagnetic flow valve 66 passes through the sealing cylinder 19 at the corresponding position, and the cable drag chain 51 is electrically connected with the electric screw rod 55, the mechanical arm 56, the electric arc-shaped clamping rod 57, the moving motor 59 and the electric control box 70 respectively.

[0097] The coating material is placed in the coating material tank 68, the heating box 71 heats the coating material tank 68, so that the coating material can be stably conveyed, the exhaust fan 72 exhausts the heat in the heating box 71, and the heat is discharged through the curved heat exhaust pipe 69, the curved heat exhaust pipe 69 keeps the coating material in the coating material tank 68 warm, and the discharge pump 67 injects the coating material into the electromagnetic flow valve 66, and the coating material is injected into the corresponding coating nozzle 58 through the electromagnetic flow valve 66.

[0098] The cable drag chain 51 is used for wiring, the output shaft of the moving motor 59 drives the moving gear, the moving gear is engaged with the rack 53, the sliding seat 54 is driven to slide on the guide rail seat 52, so that the coating nozzle 58 is moved, the electric screw rod 55 drives the mechanical arm 56 to move longitudinally, the mechanical arm 56 drives the electric arc-shaped clamping rod 57 to adjust the angle, so that the clamping rod of the electric arc-shaped clamping rod 57 is wrapped on both sides of the four-split high-voltage transmission conductor, and the coating nozzle 58 is opposite to the four-split high-voltage transmission conductor, so that the four-split high-voltage transmission conductor is coated.

[0099] The cable clamping mechanism 21 comprises a terminal seat 27 and an electric push rod 32, which are fixed on the clamping support 20 at corresponding positions. The terminal seat 27 is provided with a terminal cylinder 25, and the outer side of the terminal cylinder 25 is provided with a clamping ring groove 26. The rear side of the terminal seat 27 is fixed with a support frame 30, and the support frame 30 is slidably provided with a connecting rod 29. The connecting rod 29 is hingedly connected with the terminal seat 27 through a hinged connecting rod 28 at one end. The other end of the connecting rod 29 is provided with a locking ring plate 31 which is opposite to the terminal seat 27. A conductive cable is arranged between the locking ring plate 31 and the connecting rod 29. One end of the conductive cable extends into the terminal seat 27 and is electrically connected with the terminal cylinder 25. The other end of the conductive cable passes through the sealing cylinder 19 at the corresponding position and is electrically connected with the main control operation computer 2. The telescopic end of the electric push rod 32 is fixed with a tension sensor 33. The tension sensor 33 is fixed with a base 34. The base 34 is provided with a clamping assembly 35 and a through-hole mounting plate 36. The through-hole mounting plate 36 is provided with a buckling assembly 37. The clamping assembly 35 and the buckling assembly 37 are collinear with the axis of the terminal cylinder 25. The tension detection subsystem is composed of the electric push rod 32, the tension sensor 33, the base 34 and the clamping assembly 35.

[0100] The other end of the conductive cable is electrically connected with the main control operation computer 2 for detecting the voltage level, current size and other experimental cable state information parameters. The two ends of the four-split high-voltage transmission conductor pass through the clamping assembly 35, the through-hole mounting plate 36 and the buckling assembly 37 at the corresponding positions in sequence. The clamping assembly 35 clamps the end of the four-split high-voltage transmission conductor. The telescopic end of the electric push rod 32 is retracted, the tension sensor 33 is pulled, the base 34 is moved, and thus the clamping assembly 35, the through-hole mounting plate 36 and the buckling assembly 37 are pulled. The bare wire at the end of the four-split high-voltage transmission conductor is inserted into the terminal cylinder 25 and is electrically connected with the terminal cylinder 25, so that the conductive cable is electrically connected with the four-split high-voltage transmission conductor for monitoring the experimental cable state information parameters. The buckling assembly 37 is buckled and locked in the clamping ring groove 26. The electric push rod 32, the tension sensor 33, the base 34 and the clamping assembly 35 cooperate to detect and record the tension of the four-split high-voltage transmission conductor before and after the coating layer is applied when the four-split high-voltage transmission conductor is pulled. When the four-split high-voltage transmission conductor is removed, the buckling assembly 37 is rotated to release the buckling and locking of the buckling assembly 37 on the clamping ring groove 26. The telescopic end of the electric push rod 32 is elongated, i.e. the clamping assembly 35, the through-hole mounting plate 36 and the buckling assembly 37 are pushed out, so that the bare wire at the end of the four-split high-voltage transmission conductor is pulled out of the terminal cylinder 25 and is disconnected with the terminal cylinder 25.

[0101] The clamping assembly 35 comprises a fixed plate 44, a lifting push rod 45 is fixed on the fixed plate 44, the telescopic end of the lifting push rod 45 is fixed with a linkage crossbar 47, the two ends of the linkage crossbar 47 are hingedly connected with hinged connecting rods 48, the hinged connecting rods 48 are hingedly connected with the fixed plate 44, the end of the hinged connecting rod 48 is hingedly connected with a circular arc clamping plate 49, and the inner side of the circular arc clamping plate 49 is provided with an insulating anti-skid layer 50; the buckling assembly 37 comprises a fixed cylinder 43, the fixed cylinder 43 is fixed on the through hole mounting plate 36, a plurality of circumferentially distributed position adjusting grooves 41 are formed in the fixed cylinder 43, a rotating cylinder 42 is rotatably arranged in the fixed cylinder 43, a plurality of circumferentially distributed vertical rod seats 40 are fixed on the rotating cylinder 42, the vertical rod seats 40 are hingedly connected with the claw 38, and the end of the claw 38 is screwed with an adjusting screw 39.

[0102] The telescopic end of the lifting push rod 45 drives the linkage crossbar 47 to be retracted, the two hinged connecting rods 48 are rotated around the fixed plate 44, the ends of the two hinged connecting rods 48 are synchronously unfolded, so that the circular arc clamping plate 49 is synchronously unfolded, the four split high-voltage transmission conductors are placed between the circular arc clamping plates 49, the telescopic end of the lifting push rod 45 drives the linkage crossbar 47 to be elongated, the two hinged connecting rods 48 are rotated around the fixed plate 44, the ends of the two hinged connecting rods 48 are synchronously retracted, so that the circular arc clamping plate 49 is synchronously retracted, and the insulating anti-skid layer 50 is clamped on the four split high-voltage transmission conductors;

[0103] The rotating cylinder 42 is manually rotated, the rotating cylinder 42 drives the plurality of circumferentially distributed vertical rod seats 40 to rotate, so that the claw 38 is synchronously rotated, the screwing depth of the adjusting screw 39 is adjusted, the end of the adjusting screw 39 is abutted on the fixed cylinder 43, and the claw 38 is buckled and clamped in the clamping ring groove 26; when the buckling is released, the rotating cylinder 42 is manually rotated, the end of the adjusting screw 39 is slid into the corresponding position adjusting groove 41, and the end of the claw 38 can be unfolded at this time.

[0104] The length and width of the mobile experiment cabin 1 and the fixed experiment cabin 3, the size of other hardware devices, and the number of other electrical elements can be customized according to actual experimental requirements, so that the simulation conditions of the current-carrying capacity simulation evaluation in the unit volume (or unit length) are consistent.

[0105] The cable data subsystem is used for collecting environmental temperature, environmental humidity, environmental wind speed, sunshine intensity, sunshine direction, experimental cable temperature, experimental cable outer diameter, experimental cable aging degree, experimental cable stress, coating material and coating thickness.

[0106] The simulation subsystem uses simulation technology and algorithms to simulate the operating environment parameters and coating parameters of high-voltage transmission lines under various working conditions, including but not limited to environmental temperature, environmental humidity, and environmental wind speed external factors, as well as the influence of coating material and coating thickness. By accurately modeling and simulating the physical properties and operating state of the conductor, the load capacity and performance of the conductor are predicted.

[0107] The load capacity calculation and evaluation subsystem monitors and evaluates the load capacity of high-voltage transmission conductors in real time, establishes a load capacity calculation and simulation evaluation model based on the coating-conductor-steel core composite structure of the transmission conductor, analyzes the influencing factors of the coating-conductor-steel core composite structure of the transmission line load capacity, and provides accurate evaluation results and early warning information to help operation and maintenance personnel timely discover and handle potential problems.

[0108] Simulated operating environment parameters: environmental temperature, environmental humidity, environmental wind speed, solar intensity, and solar azimuth, etc.

[0109] Experimental cable basic parameters: experimental cable outer diameter, experimental cable age, experimental cable resistance per unit length, experimental cable stress, voltage grade, current size, etc.

[0110] Coating parameters: coating material and coating thickness, etc.

[0111] Control variable method is used: by keeping several parameters unchanged and only changing one variable, the influence of the variable on the result or phenomenon is observed and analyzed.

[0112] The following is the relationship between coating parameters and load capacity (and experimental cable temperature) load capacity simulation evaluation under the condition that the simulated operating environment parameters and experimental cable basic parameters are kept the same.

[0113] The coating material is set to two types: coating material one, including A component and B component, the A component is mainly composed of one or several of polyol, isocyanate, isocyanate prepolymer and isocyanate modifier, the B component is mainly composed of polyether, porous metal oxide powder filler and room temperature vulcanized silicone rubber, the A component and the B component are stored separately, and the conductor insulation coating is obtained after mixing when used.

[0114] Coating material two is composed of the following mass fractions of raw materials: manganese zinc ferrite nanoparticles 13 parts, hydroxyl-terminated dimethyl polysiloxane 33 parts, nano silicon dioxide 15 parts, silicon nitride 11 parts, mica powder 5 parts, polyethylene resin 15 parts, dihydroxy tetra-active hydrogen unsaturated siloxane 60 parts, isocyanic acid 10 parts, fatty acid ester 10 parts;

[0115] The main production steps are as follows: including the following steps:

[0116] S1, manganese zinc ferrite nanoparticles are added to a grinder, and 5%-25% of oleic acid is added for mixing and grinding, after grinding, the product residue is dried, and after drying, the manganese zinc ferrite nanopowder is collected by adsorption with magnetic material;

[0117] S2, hydroxyl-terminated dimethyl polysiloxane, nanosilica, silicon nitride and mica powder are added to a mixer for mixing and stirring, and filtering to obtain a first mixture;

[0118] S3, after washing and drying the mixer, polyethylene resin, dihydroxy tetra-active hydrogen unsaturated siloxane, isocyanic acid and fatty acid ester are added to the mixer for mixing reaction, the reaction time is 100-160 min, and the reaction temperature is 50-70℃, to obtain a second mixture;

[0119] S4, manganese zinc ferrite nanopowder, the first mixture and the second mixture are weighed and proportioned according to mass parts for standby;

[0120] S5, after washing and drying the mixer again, the manganese zinc ferrite nanopowder, the first mixture and the second mixture after proportioning are added to the mixer for mixing and stirring to obtain a protective coating finished product.

[0121] When the load flow of the high-voltage transmission conductor exceeds the preset threshold, the early warning subsystem automatically sends a warning or alarm information to remind the operation and maintenance personnel to take timely measures for processing, and provides timely maintenance suggestions to ensure the safe and stable operation of the power system.

[0122] Embodiment 1: input experimental cable basic parameters and simulated running environment parameters through the main control operation computer component 2; open the mobile experiment cabin 1, the electric scissor type adjusting frame 13 is retracted, driving the mobile cabin frame 15 to move, and then driving the flexible cover 14 to retract;

[0123] The other end of the conductive cable is electrically connected with the master control computer 2, which is used to detect the voltage level, current size and other experimental cable state information parameters. The two ends of the four-split high-voltage transmission conductor pass through the clamping assembly 35, the through-hole mounting plate 36 and the buckling assembly 37 in the corresponding positions in sequence. The extension end of the lifting push rod 45 drives the extension of the linkage cross bar 47, pulls the two hinged connecting rods 48 to rotate around the fixed plate 44, and the end portions of the two hinged connecting rods 48 are synchronously retracted, thereby driving the synchronous retraction of the circular-arc clamping plate 49, so that the insulating anti-skid layer 50 is clamped on the four-split high-voltage transmission conductor. The extension end of the electric push rod 32 is retracted, the tension sensor 33 is pulled, the base 34 is moved by the tension sensor 33, thereby pulling the clamping assembly 35, the through-hole mounting plate 36 and the buckling assembly 37, and inserting the bare wire at the end of the four-split high-voltage transmission conductor into the inside of the terminal cylinder 25 to be electrically connected with the terminal cylinder 25, so that the conductive cable is electrically connected with the four-split high-voltage transmission conductor. At this time, the rotating cylinder 42 is manually rotated, the rotating cylinder 42 drives the rotation of the plurality of circumferentially distributed vertical rod seats 40, thereby driving the synchronous rotation of the pawl 38, adjusting the screwing depth of the adjusting screw rod 39, and making the end portion of the adjusting screw rod 39 abut against the fixed cylinder 43 for clamping buckling, that is, the pawl 38 is buckled in the clamping ring groove 26;

[0124] The electric push rod 32, the tension sensor 33, the base 34 and the clamping assembly 35 cooperate to detect and record the tension before and after the four-split high-voltage transmission conductor is coated, and transmit the tension data to the cable data subsystem;

[0125] The mobile experimental cabin 1 is closed, the electric scissor adjusting frame 13 is expanded, the mobile cabin frame 15 is moved, and then the flexible cover 14 is expanded, the sealing protrusion 9 is matched with the sealing groove 17, and the two sealing telescopic rods are clamped on the two sides of the water receiving bottom box 24 for sealing. The mobile experimental cabin 1 and the fixed experimental cabin 3 form a sealed space.

[0126] The simulation subsystem controls the wind speed simulation subsystem to simulate the environmental wind speed, and controls the temperature simulation subsystem to simulate the environmental temperature. The cold air fan 77 blows cold air after passing through the refrigeration box 78, the cold air enters one side of the ventilation box 18 through the air outlet cylinder 79, and blows on the four-split high-voltage transmission conductor to be evaluated clamped by the eight cable clamping subsystems through the ventilation box 18 to simulate the environmental cold wind. The hot air fan 81 blows hot air after passing through the hot air box 80, the hot air enters the other side of the ventilation box 18, and blows on the four-split high-voltage transmission conductor to be evaluated clamped by the eight cable clamping subsystems through the ventilation box 18 to simulate the environmental hot wind. The cold air fan 77, the hot air fan 81 and the ventilation box 18 cooperate to simulate the environmental wind speed, and the wind speed sensor monitors the environmental wind speed in real time.

[0127] The control sunlight simulation subsystem simulates sunlight intensity and sunlight azimuth, controls the explosion-proof temperature control lamp 8 at different positions to turn on, simulates sunlight intensity and sunlight azimuth, and the light sensor detects light intensity for effective feedback.

[0128] The control rainfall simulation subsystem simulates environmental humidity, the water pump 60 pumps out the clean water in the water tank 61 and injects into the main water pipe 62, then drains through a plurality of drain pipes 64, sprays through the rainfall nozzles 65 to the four split high-voltage transmission cables clamped by the eight cable clamping subsystems, simulates environmental humidity, and simulates rainfall. The humidity sensor is used to detect environmental humidity.

[0129] The cable temperature measurement subsystem monitors the temperature of the four split high-voltage transmission cables in real time. A plurality of optical fiber temperature sensors 11 are used to monitor the temperature of the experimental cables in real time, and the temperature data is transmitted to the cable data subsystem.

[0130] The cable data subsystem is used to collect environmental temperature, environmental humidity, environmental wind speed, sunlight intensity, sunlight azimuth, experimental cable temperature, experimental cable outer diameter, experimental cable newness, experimental cable stress, coating material, and coating thickness.

[0131] The ampacity calculation and evaluation subsystem monitors and evaluates the ampacity of the high-voltage transmission cable in real time, establishes an ampacity calculation and simulation evaluation model of the transmission cable based on the coating-conductor-steel core composite structure, analyzes the influencing factors of the ampacity of the transmission line with the coating-conductor-steel core composite structure, provides accurate evaluation results and early warning information, helps operation and maintenance personnel to find and handle potential problems in time, and obtains the ampacity of the high-voltage transmission cable without coating at this time.

[0132] In embodiment 1, the coating material one and the coating thickness of 0.5 mm are input through the main control operation computer 2, the simulation simulation subsystem controls the coating coating subsystem to coat the four split high-voltage transmission cables and controls the spraying thickness, the coating material one is placed in the coating material tank 68, the heating box 71 heats the coating material tank 68, so that the coating material can be stably conveyed, the exhaust fan 72 pumps out the heat in the heating box 71, and the heat is discharged through the curved heat exhaust pipe 69. The curved heat exhaust pipe 69 keeps the coating material in the coating material tank 68 warm, the discharge pump 67 injects the coating material into the electromagnetic flow valve 66, and the electromagnetic flow valve 66 injects the coating material into the corresponding coating nozzle 58.

[0133] The cable drag chain 51 is used for wiring, the output shaft of the moving motor 59 drives the moving gear, the moving gear is engaged with the rack 53, the sliding seat 54 is driven to slide on the guide rail seat 52, thereby driving the coating nozzle 58 to move, the electric screw rod 55 drives the mechanical arm 56 to move longitudinally, the mechanical arm 56 drives the electric arc-shaped clamping rod 57 to adjust the angle, so that the clamping rod of the electric arc-shaped clamping rod 57 is wrapped on both sides of the four-split high-voltage transmission conductor, the coating nozzle 58 is opposite to the four-split high-voltage transmission conductor, and the four-split high-voltage transmission conductor is coated with a coating with a thickness of 0.5 mm;

[0134] After drying, the tension detection subsystem detects and records the tension of the four-split high-voltage transmission conductor at this time; and then the simulation subsystem controls the wind speed simulation subsystem to simulate the environmental wind speed, controls the sunshine simulation subsystem to simulate the sunshine intensity and sunshine direction, controls the temperature simulation subsystem to simulate the environmental temperature, and controls the precipitation simulation subsystem to simulate the environmental humidity;

[0135] The simulation subsystem controls the wind speed simulation subsystem to simulate the environmental wind speed, controls the sunshine simulation subsystem to simulate the sunshine intensity and sunshine direction, controls the temperature simulation subsystem to simulate the environmental temperature, and controls the precipitation simulation subsystem to simulate the environmental humidity; the cable temperature measurement subsystem monitors the temperature of the four-split high-voltage transmission conductor at this time in real time, the cable data subsystem is used for collecting various performance data parameters, and the current-carrying capacity calculation and evaluation subsystem monitors and evaluates the current-carrying capacity of the high-voltage transmission conductor after coating in real time; and the current-carrying capacity of the high-voltage transmission conductor with a coating thickness of 0.5 mm is obtained.

[0136] Example 3: On the basis of example 1, the coating material one and the coating thickness 0.7 mm are input through the main control operation computer 2, the simulation current-carrying capacity experiment steps of example 2 are repeated, and the current-carrying capacity of the high-voltage transmission conductor with a coating thickness of 0.7 mm is obtained.

[0137] Example 4: On the basis of example 1, the coating material one and the coating thickness 0.9 mm are input through the main control operation computer 2, the simulation current-carrying capacity experiment steps of example 2 are repeated, and the current-carrying capacity of the high-voltage transmission conductor with a coating thickness of 0.9 mm is obtained.

[0138] Example 5: On the basis of example 1, the coating material one and the coating thickness 1.1 mm are input through the main control operation computer 2, the simulation current-carrying capacity experiment steps of example 2 are repeated, and the current-carrying capacity of the high-voltage transmission conductor with a coating thickness of 1.1 mm is obtained.

[0139] Example 6: On the basis of example 1, the coating material one and the coating thickness 1.3 mm are input through the main control operation computer 2, the simulation current-carrying capacity experiment steps of example 2 are repeated, and the current-carrying capacity of the high-voltage transmission conductor with a coating thickness of 1.3 mm is obtained.

[0140] Example 7: On the basis of Example 1, by the host computer 2 input coating material one and coating thickness 1.5mm, repeat the simulation of the current carrying capacity of the experimental steps of Example 2, get the thickness of 1.5mm coating of high voltage transmission line of current carrying capacity.

[0141] Example 8: On the basis of Example 1, by the host computer 2 input coating material one and coating thickness 1.7mm, repeat the simulation of the current carrying capacity of the experimental steps of Example 2, get the thickness of 1.7mm coating of high voltage transmission line of current carrying capacity.

[0142] Example 1-8 coating material one comparative experiment, coating material one comparative experiment table as shown in Figure 13

[0143] The existing calculation of the current carrying capacity generally uses the simulation calculation formula provided in the standard GB50545-2010 "110kV~750kV overhead transmission line design specification" implemented on July 1, 2010: , wherein is the radiation heat dissipation power, its value is:

[0144] In the formula, D is the diameter of the wire; ε is the radiation heat dissipation coefficient of the wire surface, 0.23~0.43 for bright new line, 0.9~0.95 for old line or black anticorrosive line; S is the Stefan-Boltzmann constant, 5.67×10-8 ; is the allowable temperature of the wire surface; is the ambient temperature.

[0145] is the convective heat dissipation power. Its value is: In the formula, v is the wind speed perpendicular to the wire.

[0146] is the solar heat absorption power, its value is α is the heat absorption coefficient of the wire surface, 0.35~0.46 for bright new line, 0.9~0.95 for old line or black anticorrosive line; J is the solar radiation intensity of the wire, 1000 in the case of direct sunlight on the wire in sunny day.

[0147] is the allowable temperature of the wire surface;

[0148] Example 9-16, compared with Example 1-8, coating material one is changed to coating material two, the rest of the simulation of the current carrying capacity of the experimental steps is unchanged, coating material two comparative experiment of Example 9-16, coating material two comparative experiment table as shown in Figure 14 ​​

[0149] By Figure 13 And Figure 14 It can be seen that the relationship between the coating thickness and the current-carrying capacity and the coating thickness on the cooling effect presents a nonlinear relationship, within a certain range, the coating thickness increases, the wire temperature drop decreases, the current-carrying capacity increases, when the coating thickness reaches a certain critical value, the cooling effect tends to saturation, the current-carrying capacity tends to saturation;

[0150] Each coating material has a corresponding thickness of the best coating constant k.

[0151] And the reflection of solar radiation and heat dissipation effect of coating material two is obviously better than that of coating material one, and the current-carrying capacity effect of coating material two is better.

[0152] The program code used in the simulation evaluation system:

[0153] #include <vector>

[0154] #include <cmath>

[0155] / / hypothetical temperature distribution solver function

[0156] std::vector <double>solve_temperature(const std::vector <double>input_data) {

[0157] / / initialize temperature distribution array

[0158] std::vector <double>temperature_distribution(input_data.size(),0.0);

[0159] / / Linear interpolation calculation

[0160] for (size_t i = 0; i <input_data.size(); ++i) {

[0161] temperature_distribution[i] = input_data[i] * some_coefficient; / / some_coefficient is a constant or function, determined according to the specific situation.

[0162] }

[0163] return temperature_distribution;

[0164] }

[0165] / / Calculate current carrying capacity based on temperature distribution

[0166] double calculate_capacity_from_temperature(const std::vector <double>&temperature_distribution) {

[0167] / / hypothetical current capacity calculation function

[0168] double current_capacity = 0.0;

[0169] / / summation calculation

[0170] for (double temp : temperature_distribution) {

[0171] current_capacity += temp * another_coefficient; / / another_coefficient is a certain constant or function, determined according to specific circumstances

[0172] }

[0173] / / return current capacity

[0174] return current_capacity;

[0175] }

[0176] The final simulation method of the application: by inputting relevant parameters into the simulation model of the main control operation computer component 2:

[0177] Experimental cable state information parameters: outer diameter, unit length resistance, and new and old degree, etc.

[0178] Simulated operating environment parameters: environmental temperature, environmental humidity, environmental wind speed, sunshine intensity, and sunshine direction, etc.

[0179] Coating parameters: coating material and coating thickness, etc.

[0180] The current carrying capacity of the transmission conductor under the "coating-conductor-steel core" structure can be obtained: the current carrying capacity simulation calculation formula after coating the coating is: .

[0181] In the formula, k is the coating constant, the best coating constant k can be obtained after multiple simulation experiments, according to the cost of the coating material and the transmission requirement of the current carrying capacity, the coating constant k corresponding to the coating thickness is selected to obtain the maximum profit return, and is applied to actual production.

[0182] The application can also control other parameter changes to control variables and simulate and evaluate other required data.

[0183] In summary, by cooperating the mobile experiment cabin 1 and the fixed experiment cabin 3, the simulation monitoring experiment cabin is simulated to run in the environment;

[0184] By cooperating the eight cable clamping subsystems, the four-split high-voltage transmission lines are stably clamped and controlled to be electrified to simulate the voltage and current, and the tension detection subsystem detects and records the tension of the four-split high-voltage transmission lines before and after being coated with the coating;

[0185] The sunlight simulation subsystem simulates the sunlight intensity and the sunlight direction, the temperature simulation subsystem simulates the environmental temperature, the control precipitation simulation subsystem simulates the environmental humidity, the wind speed simulation subsystem simulates the environmental wind speed, and the actual running environment is simulated;

[0186] The visual monitoring subsystem monitors the internal conditions of the fixed experiment cabin 3 and the mobile experiment cabin 1 in real time, and the cable temperature measuring subsystem monitors the temperature of the four-split high-voltage transmission lines in real time;

[0187] The cable data subsystem is used to collect various performance data parameters, the simulation and simulation subsystem uses simulation technology and algorithm to simulate the running environment parameters and coating parameters of the high-voltage transmission line under various working conditions, the physical properties and running state of the line are accurately modeled and simulated, and the carrying capacity and performance of the line are predicted; the carrying capacity calculation and evaluation subsystem monitors and evaluates the carrying capacity of the high-voltage transmission line coated with the coating in real time; when the carrying capacity of the high-voltage transmission line exceeds the preset threshold, the early warning subsystem automatically sends early warning or alarm information and provides timely maintenance suggestions.

[0188] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.< / double> < / double> < / double> < / double> < / cmath> < / vector>

Claims

1. A current-carrying capacity simulation and evaluation system for a coating-conductor-steel core composite structure transmission conductor, comprising a wind speed simulation subsystem, a tensile force detection subsystem, a fixed experimental chamber (3), and a mobile experimental chamber (1) positioned opposite the fixed experimental chamber (3), characterized in that, The mobile experimental cabin (1) is equipped with a main control computer (2) on its outer side, and a solar radiation simulation subsystem and a visual monitoring subsystem on its inner side. The mobile experimental cabin (1) and the fixed experimental cabin (3) are equipped with a cable temperature measurement subsystem and a temperature simulation subsystem. The fixed experimental cabin (3) is equipped with a precipitation simulation subsystem, a coating application subsystem and eight cable clamping subsystems. The precipitation simulation subsystem, the cable clamping subsystem and the coating application subsystem are arranged in order from top to bottom. The temperature simulation subsystem is located on the side of the cable clamping subsystem. The main control computer (2) is equipped with a cable data subsystem, a simulation subsystem, a current carrying capacity calculation and evaluation subsystem and an early warning subsystem. The cable data subsystem is used to collect data including but not limited to ambient temperature, ambient humidity, ambient wind speed, solar intensity, solar orientation, experimental cable temperature, experimental cable outer diameter, experimental cable age, experimental cable stress, coating material, and coating thickness. The simulation subsystem uses simulation technology and algorithms to simulate the operating environment parameters and coating parameters of high-voltage transmission lines under various working conditions, including but not limited to external factors such as ambient temperature, ambient humidity and ambient wind speed, as well as the influence of coating materials and coating thickness. By accurately modeling and simulating the physical characteristics and operating status of the conductor, the current carrying capacity and performance of the conductor are predicted. The current carrying capacity calculation and evaluation subsystem monitors and evaluates the current carrying capacity of high-voltage transmission lines in real time. It establishes a simulation evaluation model for calculating the current carrying capacity of transmission lines based on a coating-conductor-steel core composite structure. Under the condition that the simulated operating environment parameters and the basic parameters of the experimental cable are kept the same, the current carrying capacity simulation evaluation is carried out with the coating parameters as variables, and the relationship between the coating parameters, current carrying capacity, and temperature of the experimental cable is evaluated. The influencing factors of the current carrying capacity of the coating-conductor-steel core composite structure transmission line are analyzed, and the simulation calculation formula of the current carrying capacity after coating is derived. It provides accurate evaluation results and early warning information to help operation and maintenance personnel to discover and deal with potential problems in a timely manner. When the current carrying capacity of the high-voltage transmission line exceeds a preset threshold, the early warning subsystem automatically issues an early warning or alarm message to remind maintenance personnel to take timely measures and provide timely maintenance suggestions to ensure the safe and stable operation of the power system.

2. The current-carrying capacity simulation and evaluation system for a coating-conductor-steel core composite structure transmission line according to claim 1, characterized in that, The mobile experimental chamber (1) includes a mobile chamber wall and a U-shaped mobile chamber frame (15). Several exhaust valves are provided on the mobile chamber wall. An electric scissor-type adjustment frame (13) and a flexible cover (14) are provided between the mobile chamber wall and the mobile chamber frame (15). The electric scissor-type adjustment frame (13) is located outside the flexible cover (14). The lower ends of the mobile chamber frame (15) and the electric scissor-type adjustment frame (13) are provided with moving wheels (12). The exterior of the mobile chamber frame (15) is provided with a sealing protrusion (9). Two symmetrically arranged sealing telescopic rods are provided between the mobile chamber frame (15) and the mobile chamber wall. The main control operation computer (2) includes a main control operation box and a main control computer (76). The main control operation box and the main control computer (76) are fixed on the outside of the mobile chamber wall. The main control operation box is provided with a switch button (73), a button-equipped display screen (74), and a flashing warning light (75). The main control computer (76) is connected to the button-equipped display screen (74) by wires.

3. The current-carrying capacity simulation and evaluation system for a coating-conductor-steel core composite structure transmission line according to claim 2, characterized in that, The fixed experimental chamber (3) includes a fixed chamber wall (16). The inner side of the fixed chamber wall (16) is provided with a sealing groove (17) that matches the shape and specifications of the sealing protrusion (9). The fixed chamber wall (16) is provided with several sealing cylinders (19) that penetrate the fixed chamber wall (16). The lower inner side of the fixed chamber wall (16) is provided with a water receiving box (24). The water receiving box (24) is provided with a drain pipe that passes through the fixed chamber wall (16). Two sealing telescopic rods are engaged on both sides of the water receiving box (24). The inner side of the fixed chamber wall (16) is fixed with two symmetrically arranged clamping brackets (20). Every four cable clamping subsystems are set on one clamping bracket (20), and the eight cable clamping subsystems are arranged symmetrically in pairs.

4. The current-carrying capacity simulation and evaluation system for a coating-conductor-steel core composite structure transmission line according to claim 3, characterized in that, The solar simulation subsystem includes several explosion-proof temperature control lamps (8) and several light sensors. The explosion-proof temperature control lamps (8) are fixed on the inner side of the moving cabin frame (15) and the inner side of the moving cabin wall, respectively. The light sensors are fixed on the inner side of the moving cabin frame (15) and the inner side of the fixed cabin wall (16). The visual monitoring subsystem includes several visual cameras (10). The visual cameras (10) are fixed on the inner side of the moving cabin frame (15) and the inner side of the moving cabin wall, respectively. The cable temperature measurement subsystem includes several fiber optic temperature sensors (11). The fiber optic temperature sensors (11) are fixed on the inner side of the moving cabin wall and the upper end of the water receiving box (24), respectively.

5. The current-carrying capacity simulation and evaluation system for a coating-conductor-steel core composite structure transmission conductor according to claim 4, characterized in that, The temperature simulation subsystem includes a cold air assembly (4), a hot air assembly (7), a ventilation box (18), and several temperature sensors. The cold air assembly (4) and the hot air assembly (7) are located on the outside of the fixed chamber wall (16), and the ventilation box (18) is fixed on the inside of the fixed chamber wall (16). The temperature sensors are located inside the mobile experimental chamber (1) and the fixed experimental chamber (3). The cold air assembly (4) includes a refrigeration box (78). A cold air fan (77) is fixed on the outside of the refrigeration box (78), and an air outlet duct (79) is fixed on the inside of the refrigeration box (78). The air outlet duct (79) is connected to one side of the ventilation box (18) through a pipe. The pipe between the air outlet (79) and the ventilation box (18) passes through the corresponding sealing cylinder (19). The hot air assembly (7) includes a hot air box (80). A hot air fan (81) is fixed on the outside of the hot air box (80). The air outlet of the hot air box (80) is connected to the other side of the ventilation box (18) through a pipe. The pipe between the air outlet of the hot air box (80) and the ventilation box (18) passes through the corresponding sealing cylinder (19). The wind speed simulation subsystem consists of a cold air fan (77), a hot air fan (81), a ventilation box (18), and several wind speed sensors. The wind speed sensors are fixed on the inside of the movable cabin frame (15).

6. The current-carrying capacity simulation and evaluation system for a coating-conductor-steel core composite structure transmission conductor according to claim 5, characterized in that, The precipitation simulation subsystem includes a water injection tank assembly (6), a precipitation simulation mechanism (23), and several humidity sensors. The water injection tank assembly (6) is located outside the fixed bulkhead (16), and the precipitation simulation mechanism (23) is located above the ventilation box (18). The water injection tank assembly (6) includes a water pump (60) and a water tank (61). The water inlet of the water pump (60) and the water tank (61) are connected by a pipe. The precipitation simulation mechanism (23) includes a main water pipe (62), and the water outlet of the water pump (60) is connected to the main water pipe (62). The water pipes (62) are connected by a pipe. The pipe between the outlet of the water pump (60) and the main water pipe (62) passes through the sealing cylinder (19) at the corresponding position. Several supports (63) are fixed at the lower end of the main water pipe (62). The supports (63) are fixed above the ventilation box (18). Several drain pipes (64) are provided on the side of the main water pipe (62). Several rain spray nozzles (65) are provided at the lower end of the drain pipes (64). The humidity sensor is fixed inside the fixed experimental chamber (3) and the mobile experimental chamber (1).

7. The current-carrying capacity simulation and evaluation system for a coating-conductor-steel core composite structure transmission line according to claim 6, characterized in that, The coating subsystem includes a coating feeding mechanism (5) and a coating application mechanism (22). The coating feeding mechanism (5) is located outside the fixed bulkhead (16), and the coating application mechanism (22) is located at the upper end of the water receiving box (24). The coating feeding mechanism (5) includes an electromagnetic flow valve (66), a discharge pump (67), an electrical control box (70), and a heating box (71). A coating material tank (68) is fixed at the upper end of the heating box (71). The coating material tank (68) has a curved heat exhaust pipe (69) inside, and the upper end of the heat exhaust pipe (69) extends out of the coating material tank (68). Above, the lower end of the heat exhaust pipe (69) extends out to the side of the coating material tank (68). The lower end of the heat exhaust pipe (69) is connected to the exhaust fan (72). The air inlet of the exhaust fan (72) is connected to the heating box (71). The feed inlet of the discharge pump (67) is connected to the coating material tank (68) through a pipe. The discharge end of the discharge pump (67) is connected to the electromagnetic flow valve (66) through a pipe. The electrical control box (70) is connected to the electromagnetic flow valve (66), the discharge pump (67), the heating box (71), the exhaust fan (72), and the main control computer (2) by wires. The coating mechanism (22) includes a guide rail seat (52) and a cable chain plate. The guide rail seat (52) and the cable chain plate are fixed to the upper end of the water receiving box (24). A rack (53) is fixed to the side of the guide rail seat (52). A sliding seat (54) is slidably provided on the guide rail seat (52). A cable cable chain (51) is provided between the sliding seat (54) and the cable chain plate. A moving motor (59) and an electric lead screw (55) are fixed on the sliding seat (54). A moving gear is fixed on the output shaft of the moving motor (59). The moving gear meshes with the rack (53). A motor is driven on the electric lead screw (55). The robotic arm (56) has an electric arc clamp (57) at its end. Each clamp of the electric arc clamp (57) has two coating nozzles (58). The coating nozzles (58) are connected to the discharge end of the electromagnetic flow valve (66) through a pipe. The pipe between the coating nozzles (58) and the discharge end of the electromagnetic flow valve (66) passes through the corresponding sealing cylinder (19). The cable drag chain (51) is connected to the electric screw (55), the robotic arm (56), the electric arc clamp (57), the moving motor (59), and the electrical control box (70) wires respectively.

8. The current-carrying capacity simulation and evaluation system for a coating-conductor-steel core composite structure transmission conductor according to claim 7, characterized in that, The cable clamping mechanism (21) includes a terminal block (27) and an electric push rod (32). The terminal block (27) and the electric push rod (32) are fixed on the clamping bracket (20) at corresponding positions. The terminal block (27) is provided with a terminal tube (25). The outer side of the terminal tube (25) is provided with a locking ring groove (26). The rear side of the terminal block (27) is fixed with a support frame (30). A connecting rod (29) is slidably provided on the support frame (30). One end of the connecting rod (29) is hinged to the terminal block (27) with a hinged connecting rod (28). The other end of the connecting rod (29) is provided with a locking ring plate (31) positioned directly opposite the terminal block (27). A conductive cable is provided between the locking ring plate (31) and the connecting rod (29). One end of the conductive cable extends into the cable. The conductive cable is electrically connected to the junction box (25) inside the junction box (27). The other end of the conductive cable passes through the sealing cylinder (19) at the corresponding position and is electrically connected to the main control computer (2). The extension end of the electric push rod (32) is fixed with a tension sensor (33). The tension sensor (33) is fixed with a base (34). The base (34) is provided with a clamping assembly (35) and a through hole mounting plate (36). The through hole mounting plate (36) is provided with a fastening assembly (37). The clamping assembly (35) and the fastening assembly (37) are both collinear with the axis of the junction box (25). The tension detection subsystem consists of the electric push rod (32), the tension sensor (33), the base (34), and the clamping assembly (35).

9. The current-carrying capacity simulation and evaluation system for a coating-conductor-steel core composite structure transmission conductor according to claim 8, characterized in that, The clamping assembly (35) includes a fixed plate (44), on which a lifting push rod (45) is fixed. A connecting crossbar (47) is fixed to the telescopic end of the lifting push rod (45). Both ends of the connecting crossbar (47) are hinged to hinged connecting rods (48). The hinged connecting rods (48) are hinged to the fixed plate (44). An arc clamping plate (49) is hinged to the end of the hinged connecting rod (48). An insulating anti-slip layer (50) is provided on the inner side of the arc clamping plate (49). The fastening assembly (37) includes a fixed cylinder (43). 3) Fixed on the through hole mounting plate (36), the fixed cylinder (43) has several circumferentially distributed adjustment grooves (41), the fixed cylinder (43) has a rotating cylinder (42) inside, the rotating cylinder (42) has several circumferentially distributed pole seats (40) fixed on the rotating cylinder (42), each pole seat (40) has a latch (38) hinged on it, the end of the latch (38) is screwed with an adjusting screw (39), the position and number of the adjusting screw (39) correspond to the adjusting groove (41), and the adjusting screw (39) is directly opposite the adjusting groove (41) at the corresponding position.

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